Legacy Firefox extensions
Alphabetical index
- "Manage Search Engines" button
- "Post on VK" Button
- #GooberGabber - GamerGate Word Scrambler
- #HashMeNot
- $heriff_v2
- (OSI) Open Search Index
- +Pulse
- +Widget
- +You Google Bar
- .com IDN enabled
- .Push
- /r/CFB Easy Flair
- 1 Click Bookmark
- 1 USD in INR
- 1-click Online Document View
- 1-ClickWeather
- 1-Line
- 1mg.ro - Image Uploader Plugin
- 1TuDien
- 2 Pane Bookmarks
- 2old2play
- 3D!
- 3D Realms Forums NavMenu
- 3FM Now Playing
- 3G Proxy
- 4chan Post Reporting Helper
- 4th aspect assistant
- 4u2c.it Url shortener.
- 6PM.com Toolbar Button
- 20-20-20
- 22Pixels Sidekik
- 30 Boxes Quick Add
- 99px.ru — image collector
- 123 Travel Search
- 160by2
- 307.to
- 365Scores Notifier
- 404 Register
- 404-Error ?
- 613 Tube
- 888.it Firefox Tool
- Download shortxt from the link below
- =F|A= SmartBrowser
- @jobo.ro
- Aaapptabs
- Aardvark
- AAU Moodle Optimizer
- A backup
- ABBREX
- AbbrrMe
- abcTajpu
- Abduction! - Webpage Screenshots Screen Capture
- A Better Firefox Add-on Bar
- A Bible Verse Toolbar
- A Bit Better RTM
- about:accessibilityenabled
- about:addons Button
- about:addons Launcher
- about:cvrcek
- About:IceCream
- about:jank
- about:kitchensink
- about:kittens
- about:me
- about:me
- about:synckey
- About Add-ons
- About Menu
- About Pages
- About Pages List
- aboutpixel.de Browserbutton
- AboutPlug
- About Startup
- About support button
- About Sync
- About This Site
- Absolute Addon Bugfix
- Absolute Load Control
- AbsolutePunk.net Menu Bar
- ABV Notifier
- Accentor
- Accentuate.us
- Access Flickr!
- Access FreeNetI in iran
- Accessibar
- Accessibility Evaluation Toolbar
- Accessibility Scripts Toolbar
- AccessibleNews
- Access IranianUK in Iran
- access key akari
- Access Me
- AccessTab ver.1.0
- Accident Claim
- Accounting by Wave
- AccringtonWeb Menu 0.16
- ACC Skin Changer
- Acebug
- A Certain Manga Reader
- Acrossio
- Acryptork
- ActFox: ActTrader Firefox Addon
- ActionAlly for Firefox
- ActiveInbox for Gmail
- Active Stop Button
- Active Whois plugin for Firefox
- ACUM
- Ad-blocker for Gmail
- ad ade
- Adaptify
- Adaptive Referer Remover
- ADAT Plugin (for Firefox)
- adbar
- Ad blocker
- AdBlocker for Facebook™
- AdBlocker for Gmail™
- AdBlocker for YouTube™
- AdBlocker Lite
- AdBlock for Firefox
- Ad Blocking FiltersetP
- Adblock Plus
- AdBye - For Facebook
- AdChange For AdblockPlus
- Add-BacktoTop
- Add-on Builder Helper (discontinued)
- Add-ons Button
- Add-on SDK Examples
- Add-ons Manager Context Menu
- Add-ons Toolbar Button
- Add-Ons UKSW
- Add-on Toolbarbutton
- Add-on Tools in App Button
- add.2.cal
- Add Bookmark Here
- Add Bookmark Here ²
- Add Directly to Unsorted Bookmarks
- Addendum
- AdDetector
- Add Google Search To New Tab Page
- Addic7ed Extended Context
- Addictive Typing Lessons
- Add Image to iPhoto
- AddInto
- Add Item to Magical
- AdditFirst
- AddMoreTextToClipboard
- Add N Edit Cookies
- Add N Edit Cookies
- Addon Developer Helper
- addons
- Addons Manager Hilite
- Addons Memory Usage - Button
- Addon Status Logger
- Add to Dealsplus
- Add to Factr
- Add to Fashiolista
- Add to feedly
- Add to Knowtex
- Add to Omnifocus
- AddToPicasa
- Add to Search Bar
- Add to TreeDBNotes
- Add to uStart
- Add URL to Window Title (Advanced KeePass Usage)
- Add X-Forwarded-For Header
- AdF.ly Skipper ★NOW WORKING: 9/13/2017★
- Adform STT TTE
- AdFrame
- Adguard AdBlocker
- Ad Hacker
- Adhiyan
- adiary-tan Inside
- ADIC - Addon Debug Info Collector
- Ad Killer
- Adlesse
- Ad Limiter
- admine
- Admin Helper
- AdNauseam
- Adobe DTM Switch
- A Double Click to Close Tab
- AdRater
- AdRemind.Me
- Adress bar cleaner
- Adsense Notifier
- Adsense Preview
- Ads Fund Official Add-on
- Adtance Screen Capturing
- Adult Blocker
- Advanced Amazon Discount Finder
- Advanced Bookmark Search
- Advanced Cookie Manager
- Advanced Dork:
- advancedKeywords
- Advanced Locationbar
- Advanced Search
- Advanced Threat Toolbox
- Advanced Travel
- Advanced URL Builder
- Advance Video Search Engine 3gp, mp4, flv, avi
- AdvertBan
- AdWords OK
- Aeropost Plug-in
- AeyTimes Ideas Toolbar
- AFDigitale Plugin
- AffiliateFox
- Affiliate Redirect
- affilinet Extension
- Affilorama SEO Toolbar
- Affinity Add-on for Tracker
- Affinity For Tracker Add-On
- AFP News Receiver
- AfterCoupon India
- After the Deadline - Spell and Grammar Checker
- Age Cerebral
- Ageless for YouTube
- Aging Tabs
- Agrega Tagger
- aguse.jp
- aguse Gateway
- A HREF++
- Ahrefs SEO Toolbar
- ahsweN Forum Smiley
- AIDA Disambiguation
- AigaionPaste
- AImusic
- Aionfox
- AIO Search Toolbar
- AirSet Connector
- Airtel broadband data tracker
- AJAX Yahoo! Mail [Viamatic WebMail++]
- Akari Link Shortener
- akayserhat test
- Ak Facebook Sohbet Eski Görüntü
- Akonter Share links & Page Buttons
- Akvarijske-ribe.com
- Alerte-Promo
- AlertIP
- AlertStopper
- Alert the Developer
- alexa lite
- Algo Toolbar
- Aliexpress Seller Check
- Aliexpress Shopping Assistant
- alisec
- All-in-One Gestures
- All-in-One Sidebar
- AllBlock
- allcookies
- All Customized Links
- All Downloader Professional
- Allegro Search
- AllHYIPMonitors.com
- All in One(AIO) IP LookUp and Tracing
- All In One Search Bar
- All In One Ultra Deal Tracker
- allmusic.com Search Toolbar and Pop-up Menu
- Allmystery
- allprotutorscreenshare
- AllQuakes
- All search engines on your tab
- alltagz
- AllTheGames ToolBar
- All The Same
- All the Tools
- AllTube Download
- AllYourJobs
- ALLYouTubeDownloader
- Alphanumerator
- AlphaTicker
- Alpheios Arabic Tools
- Alpheios Basic Libraries
- Alpheios Greek Tools
- Alpheios Latin Tools
- AlshekyTranslator(Beta)By Mohammed Alsheky
- altctrl
- Alternative RuneScape Gamebar
- Alternative Viewpoint
- ALTintext
- Altocloud Screen Share
- AltToTitle
- Always Ask
- Always Default Client
- Always on Top
- Always Right
- Always Show History Settings
- AmabayFox - Compare Amazon™ and eBay™ Prices
- Amazing eBay Highlight Search
- Amazing Media Browser
- AmazingPaste
- Amazon.com + Search-Suggestions
- Amazon Assistant for Firefox
- Amazon button+
- Amazonbutton CA
- Amazonbutton DE
- Amazonbutton FR
- Amazonbutton JP
- Amazonbutton UK
- Amazon Click
- Amazon Comparison
- Amazon Deals Finder
- Amazon de Suche
- Amazon Easy Search
- Amazon et al. - (Ebay, BestBuy, Gamestop, Woot)
- amazonfilleritemfinder
- Amazon for Effective Charities
- Amazon Gift
- Amazon Killer
- amazonlinks
- Amazon Local Currency
- Amazon Mini Shop
- Amazon MP3 Daily Deal Button
- Amazon OtonagaiSwitch
- amazon popup image
- Amazon Products Gallery
- Amazon Shopping Cart Images
- amazon with Google books
- Amazon Zocalo Web Clipper
- Ambience
- Ambient Aurea
- Ambition
- Ameliste Click
- Ameren Day-Ahead Prices Toolbar
- amernet
- Amernet screen sharing extension for firefox.
- AMF Explorer
- Am I Online?
- AmIOnMySpace.com?
- AMO Admin Assistant
- amoebaRL
- AMO Modifications
- AMO Queue Helper
- Amplify
- Amy's link changer test
- Anaglyph 3D
- Anchors reveal
- Anchorun
- Andaaju
- Andinia.com - Search from the Context Menu
- Android Debug Bridge For Firefox
- Android New Tab
- Androi User Agent
- Anekdots
- Angara
- Angry Birds New Tab
- AniDisableHacked
- Animal Forest BGM
- Animat
- AnimatedTabs.com - a new gif on every new tab
- Aniverto (Night Mode Lite)
- AniWeather
- Ank Pixiv Tool
- AnnoMarket
- Annotary
- Annotea Ubimarks
- Annoyance Remover
- Anonify Browser
- Anonymization Toolbar
- anonymoX
- Ansi and Ascii Artists Handle Database
- ansitel Click-to-Dial
- Answers
- Ante Telugu Dictionary
- Anti-Aliasing Tuner
- Anti-Padlock
- Anti-Paranoia
- Anti-Porn Pro - The web porn filter addon!
- Anti-Troll
- Anti Linkbucks
- antiporn
- Anti Scam Indonesia
- Anti Tumblr Infinite Scroll
- Antivir's Latest IVDF (Virus Definitions File) Version Number
- Ant Video Downloader
- AnyColor
- Any key
- Any New Tab
- Any Shirt You Want
- AO3rdr
- AOL Advanced (1)
- AOL Favorites
- AOL One Click
- AOTG Editing Site Sharing Tool
- APK Downloader
- aplo.click Button
- APNG Edit
- APOD
- Apollo Bookmark/Tab/History Sync add-on
- app.telemetry Page Speed Monitor
- App Button Clear
- App Button Close
- App Button Color
- App Button No Text
- App Button Remove
- Append New Tab
- Append to Clipboard
- AppLauncher
- Applicant Importer for COMPAS
- Application Companion for Universities
- Appmenu iconizer
- AppMenu Opener
- Appsco Dashboard
- App Tab Cleanup
- App Tab Initializer
- AppTab Nav-B-Gone
- AppTabs Plus
- Aptela
- A PurpleBunny!
- aqicn.org
- AquiPlugIn
- AQwikWiki
- ArabFilms
- Arabic Assistant
- Arabic KeyBoard
- Arabits Tools
- Arboreal
- archify
- Archive-It Proxy Mode Toggle
- Archive Everything
- Archiveror
- Archive Search
- ArchView
- Area deCoder
- ArenaTV navigation
- Are You Watching This?! Sports
- Arfcom Ad Blocker
- Argos Stock Checker
- Armadillo Live!
- Armblog.net
- ArmedCats Transloader
- Armenian Live Ticker
- Armory2Forums
- arpitgupta31 (1)
- Ars Bar
- ArsTechnica Single Page Article
- ArticlesSearch@ITPiMP
- ArunaSend
- Arxii addon (Firefox)
- ArzeshiBlocker
- Ascii2d Image Search
- ASIN-List-Tool
- ASKIt
- Ask Power Tools
- ASKResults
- Ask the Author on PubMED
- Ask Tvinx
- Ask Your Dictionary
- ASnumber
- ASP.NET Errors Linkifier
- Asp.Net Menu
- Aspator
- AspxCommerceDevs
- Assamese fonts package
- Assistant Achat
- Asterisk Click2Dial
- Aston Villa Life Supporter Extension
- AstrologicNet
- Astronomy NewTab
- AsturiasDeFiesta
- Asus Downloader
- Atavi - bookmark manager
- Athabasca University Library Access
- AtheneLive.com
- AtmosFox
- Atomic
- AtomicMPC Forums Menu
- AtrafEx
- AtTask Notifier
- AttendPrint
- Attention Recorder
- Auchan moins cher
- Auction Negs!
- AuctionSearchKit
- AuctionSensor eBay Deal Search
- Audiowala.com Player
- Augustana College Theme with Personas Interactive
- Aurora about:logo hotfix
- Australia-newspapers
- AustralisBookBar
- Australis Small Icons
- Auto-Refresh Twitter
- Auto-Sort Bookmarks
- AutoAuth
- AutoBrowse
- Auto Browser Closer
- AutoCaptcha for Firefox
- Auto Close Download Dialog
- Auto Close Tab
- AutoClose Tabs
- Auto Close Tabs
- Auto Complete
- Autocomplete Manager
- Auto Context
- AutoCopy
- AutoCopy 2
- Auto Dial
- Auto Disable IME
- AutoDogeAnywhere
- Autofill (Legacy)
- Autofill Forms
- Auto fill for oxwall
- Autofill IRCTC Tatkal Form-Plugin & Extension
- Auto focus URL bar
- Auto Form
- AutoFormer+
- AutoFormer 2
- AutoGroup
- Autohide Bookmarks
- Autohide Menubar customized bug(538580) fix
- AutoHide RSS Icon
- Autohide Tabbar
- AutoHiDPI
- AutoIt Menu
- AutoJoin for SteamGifts
- Auto Like Facebook Statuses Plus++
- AutoLoad
- Auto Login Asindo
- Automatically highlight keywords
- Automatic Save Folder
- Automatik Text Reader
- Auto Nadex Ticket Extension
- AutoPager
- AutoPager Fixed
- Auto Password Registerer
- Auto Pause For Youtube
- Auto Private
- AutoProxy
- AutoProxy Plus
- AutoProxy Proxy Manager
- Auto Refresh
- Auto Refresh For Twitter
- Auto Reload
- Auto Replay For Youtube
- Auto Reset Browser
- Auto Restore Cookies on Startup
- Auto Save Document
- AutoSave Plus for ScrapBook Plus / XSidebar
- AutoScout24 - Show Seller Location
- AutoScroll for musicians
- Auto Shutdown
- Auto Shutdown NG
- AutoSlideshow
- Auto Toggle Tabs
- Autotrans
- autotranslator
- Autotrans Reloaded
- Auto USPS Customs Forms
- Avastats for Firefox
- Avery Universal Package Tracker
- Avetix Safe Browsing
- AVG Do Not Track
- avi33t
- A View From My Seat for StubHub
- A View From My Seat for TicketMaster
- AVIM
- Avoid Facebook share
- Avro Phonetic
- AVZ Calculator
- avzCalculator
- A waiting notication monitor for Minichan BBS
- AwayFind for Gmail
- AWB Proxy
- Awesome Autocomplete for GitHub
- Awesome Bar !!
- Awesomebooks toolbar
- Awesome Facts
- Awesomer Bar
- Awesome Screenshot Plus - Capture, Annotate & More
- Awesome Search Extension
- Awesome Throbber
- Awesome Timestamp
- Awesomolocity Toolbar
- Awetest Recorder
- awPlus
- Axon - Wordnik & Wikipedia add-on
- Ayar Myanmar Unicode Dictionary (MM-EN-MM)
- azid - Amazon Zoom Image Downloader
- azWebsiteWorth
- b-in_wtb_v2.0.
- Baabler ¡Escuchá la Web!
- bab.la dictionary toolbar
- BabelBar
- BabelSheep (Cumbrianator) Button
- BabelZilla Glossary Extension
- Babe of the Day
- Babylon Dictionary Word Search
- Babylon Search Online Demo (Japanese)
- Back/forward dropmarker
- Back/Forward History Tweaks
- Back/Forward No Tooltips
- Back/Forward Thumbnail
- Backgroundimage Saver
- Background Tabs
- Back IS Close
- Backlink Explorer
- BackLinks Bar
- Backpack Pages
- Backpack Publish
- Backslash to Forward slash
- BackSpace Disabler
- Backspace Enabler
- Back Taringa
- Back to Close
- Back to Google
- Back to http protocol
- Back to Owner Tab
- Back to Top
- BackTrack Tab History
- BackupFox
- BackupHelper Plus for ScrapBook Plus / XSidebar
- Backward Forward History Dropdown
- backword
- Badongo Bar
- Bagf BMI Calculator
- Bagf Chemistry
- Bagf Link Shortener
- Bagf Password Generator
- Bagf Save Bunnies
- Bahai Calendar
- Bahá'í Toolbar
- Baidu Search
- Baidu Tieba Harmonizer
- Baixou Agora
- Balatarin Companion
- Bamboo Feed Reader
- BananaForScale
- Banckle Chat for Firefox
- BandSport Parental Control
- bandungnewsphoto.com
- Bandwidth Meter and Diagnostics
- BanglaCricket Toolbar
- Bangla to English Dictionary
- Banned in Pakistan
- Banner Colours Changer
- Baow Resource Manager
- BAPS Client
- Barcode Generator
- Bard College Theme with Personas Interactive
- Baren 2.1
- Bargain Book Mole
- BargainEZ Coupons & Deals
- BargainMatch
- Barlesque
- Barra de Descontos Boas Promoções
- Barra de Español
- Barrel Roll 0.1
- BarTab
- BarTab Lite
- BarTab Lite X
- Basic Bookmarks for Firefox
- Basic Calculator
- basic functions old
- basic shortcuts
- basic shortcuts old
- Basketapp
- Basketball Interactive Theme, track your NBA teams
- BatchDownload
- Battletag for Battlelog™
- BauLink info bar
- Bayt.com Job Search Toolbar
- Bazaar Plus
- Bazaar Search
- Bazzacuda Image Saver
- Bazzacuda Image Saver Plus
- BBCode
- BBCodeXtra
- BBComposer
- BBDict
- bbeContainer
- BBSFox
- BB Tags
- Bccth.is For Twitter
- bcrrdbdl
- BEAMSActivator
- Beatnik
- Beauty and the Beast New Tab
- BeeFree
- Beeline
- Beezik Multi
- Beginfo
- Behind The Overlay
- Belgium eID
- bellntid
- beneclick.ch donation addon - shop & help
- Bengali fonts package
- Beppify
- Best Bingo Apps
- Best Deal Hunter
- Best Games
- Best Homepage Ever - New Tab Quick Launch (Free)
- Bestsellers and Search on Rakuten, Amazon and Yahoo! Shopping
- Best Sidebar Bookmars Panel
- Best Youtube Mp3 Download
- beSure
- Betfair Affiliate Deep Link Generator
- Betfair Lliquidity Widget from Betpractice Studio
- Bethel University Theme with Personas Interactive
- Better App Tab Shortcuts
- Better Better Destiny.gg
- Better CDCS
- Better Directories
- Better FFR
- Better Flickr
- BetterGaia
- Better GCal
- Better Gmail 2
- Better GReader
- Better HKGolden
- Better JWB for ZJU
- Better MXR
- BetterSearch
- Better Torrent
- Better URL Bar
- Better YouTube
- BF2S.com Browser
- BF2S.com Toolbar Menu
- BFCNC-Link
- BGIPEO for Firefox
- BharatMatrimony
- Bhave Toolbar
- Bible Refalizer
- Bibleserver.com Suchleiste
- Bibleserver.com Toolbar
- Biblia Online
- Biblia y Concordancia - bendicion.net
- Biblion.ru Toolbar
- BibSonomy Buttons
- BiciSvet Jump Menu
- Bidalien eBay sniper button
- bidbag Remote eBay-Sniper
- Big Bang Theory Tribute Tabs
- BigBattleServers.com server monitor
- Big Buttons
- Big Clock Background
- Big Fish Coupons
- Bigger Address Bar Font
- Big New Tab Button
- bigpag web - Use your Bookmarks in any where
- BigSite Toolbar
- BinBa!
- Bing Results Remover
- Bing Search for Firefox (old)
- BingTracker
- Binnen-I be gone
- BINSniper - Find New Listings on eBay in Real Time
- BinTube Usenet Search
- Biobar
- bioFOX
- BioLegend Immunology Tools
- BioPopup
- Biotech Extension
- Birdpie
- Biscuit
- Bistri Screen Sharing
- bit.ly preview
- Bitacora
- BitBeans
- Bitbucket Issues convenience
- Bitcoin - mining statistics
- Bitcoin Prices
- Bitcoin Ticker Plus
- Bitdefender QuickScan
- Bitdefender TrafficLight for Firefox
- BitDo Link Shortener
- BitTorrent WebUI
- Bit Torrent WebUI+
- BitTorrent WebUI++
- Biz Scrambler
- BKmarkIT
- bKurdi
- bla+
- Blackbird
- Blacken
- Black Google Theme
- Blackout
- Black Skin
- Black Youtube Theme
- Blank Canvas Signatures for Gmail
- Blank Scratchpad
- Blank Your Monitor + Easy Reading
- Blast Connect - Web Analysis Extension
- Blekko
- Blender
- Blend In
- BlinkList Toolbar
- blitz-firefox
- BLL Redirector
- Block "read more"
- Block comments
- Block Content (img,css,js,...)
- Blocker for Absurd News
- Block My Referer
- BlockNote
- Block PR sites
- BlockSite
- BlockSite Plus
- Block Sneaky Redirects
- Blockulicious
- Bloctoquote
- Blog Better! - Writing Helper by Zemanta
- Blogbokep.me | Bypass Situs Bokep Bersama Kami
- Blogger Bar
- BlogHer
- Bloglovin'
- Blogmark
- BlogRovR
- Blog Watcher
- Bloody Vikings!
- BlueBag
- Blue Box
- BlueBox bar
- Blue Magpie Translator
- Blur
- BMI Calculator and Weight Tracker
- BNR Exchange Rates
- BoardKeep
- Bob Marley 2014 Theme with Personas Interactive
- Bob Marley OFFICIAL Interactive Theme
- Bodybuilding.com Toolbar Extension
- BOINC Stats
- BOINC Stats 2
- bojkott_the_party_of_regions
- Bollywood Mantra Sidebar
- Bomfree
- Boo.ly Shopping - Coupons, Best Prices, & Offers
- Book'n'share Green Button
- Book'n'share Red Button
- Book Burro
- BookButler
- Book Discovery
- BookerFox
- Bookmark All
- Bookmark Autohider
- Bookmark Box
- Bookmark By Tag
- Bookmark Current Tab Set
- Bookmark Duplicate Detector
- Bookmarker - the universal sidebar for social bookmarking networks
- Bookmark Flypaper
- BookmarkG
- Bookmark Highlighter
- Bookmark Keys
- BookmarkMenuHider
- Bookmark on Utopic
- Bookmark Permissions
- Bookmark POST
- Bookmark Previews
- Bookmark quick folder
- Bookmark Rater
- Bookmark Recycler
- BookmarkReviewer
- bookmarks.html
- Bookmarks as Home Page
- Bookmarks Backup Restore [Fx 31-56]
- Bookmarks by Studioapps
- Bookmarks Deiconizer
- Bookmark Shortcut Keys
- Bookmark Shortcuts
- Bookmarks Info T!ps
- Bookmarks LinkChecker
- Bookmarks menu
- Bookmarks New Tab
- Bookmarks on line
- Bookmark Sorter
- Bookmarks Preview
- Bookmarks Scrollbar
- Bookmarks Sidebar Button
- Bookmarks Sidebar Scroll Retainer
- Bookmarks Tab
- Bookmarks Toolbar Button
- Bookmarks Toolbar Restyled
- Bookmarks UI
- Bookmarks UI Consolidator
- Bookmark Sync and Sort
- Bookmark Tab
- Bookmark This Page
- Bookmark This Page Plus
- BookmarkThisTab
- Bookmark to Desktop
- Bookmark Toolbar Buttons
- Bookmark Toolbar Icons
- Bookmark Tools
- BookmarkViewer
- Booknshare Orange Button
- Books.Ru Toolbar
- booksfordc
- Books Library
- Bookstack
- Book Text Mark
- BooM
- Boomtango
- boost-Bar
- bootlint
- Boounce
- Boox
- BooYarr
- Bork Bork Bork!
- Bornali
- Bosnian spell checker
- bosskey
- Bottom Error Console
- Bottom Tabs
- Bottom UI
- Bountysource
- Bow App Search
- Box.net Bookmarks Synchronizer
- boxedup
- BoxShooter
- Boycott Plus
- BPasswd2
- bracketlinker
- Bracket Madness Interactive Theme
- BrainLeg
- BrainyBuzz
- BrandMyMail - Email Signatures for GMail and more
- Brand View OnSite
- Brazil-newspapers
- Breadcrumbs
- BreakItDown
- Brian Vickers Red Bull Racing Interactive Theme
- Brief
- briefgeheimnis Safeguard
- Briteclick
- Broadband Speed Test and Diagnostics
- broadworks_enhancement_suite
- Browsarity
- BrowseAtWork
- Browse By Name
- Browsec VPN
- Browse Images
- Browse Later
- Browse Periodically
- Browser-Bible: xulsword
- Browser Backgrounds
- Browser Border
- Browser Console Button
- Browser JSGuard
- Browser Sign In
- BrowserTexting
- Browser Turns Editor
- Browser Uptime
- Browsing Activity Tracker
- Browsizer
- Browzmi IM + Social Surfing ("Homebase")
- BRS:Blog Recommender System
- Brwoser
- bsl
- Bsvuitinh.com
- Buckts - Facebook, RSS Reader, Shopping Discounts
- budaneki
- BuddyFox
- BUE Toolbar
- Buffalo State U Theme with Personas Interactive
- BufferInfinite : Online Video Subtitling Service.
- Bug.hr izbornik
- Bug 586234 Unfixer
- Bug 615866 Fix
- Buggybar
- bugmagnet
- Bugmail Tweaks
- BugMeNot
- BugTracker.NET Screen Capture
- Bugtracker Reporter
- bugzilla-diff-highlight
- BugzillaJS - Tweaks for Bugzilla
- Bugzilla Request Flags
- Bugzilla Tweaks
- BuiltWith
- BuiltWith Tab
- Bukunle Movie Search
- Bulk Image Downloader
- Bulk Stored Password Changer
- Bullo di figa
- Bumia
- Bunchcut
- buoga
- Buscador de Remates
- Buscador para MercadoLibre.cl
- Busca NZB Button
- BusinessViewer
- butsa.ru players training
- Buttonizer
- Buttons Back
- Button to Clear URL and Search
- BUY.COM Context Menu
- BuyBuddy
- BuyInLess
- Buy it online
- buySAFE Shopping Advisor
- BW-Addon
- BW-Checker
- BW-pie-AuthRefresher
- BW-pie-Locator
- Byndd Screen Capture - Firefox
- BYOB Side Animals Tool
- Bypass.rd.to V 0.6
- BypassAdfly
- Bypass Forced Download
- Byteswap Toolbar
- bz-yahoo-search
- bzAPI
- BzDeck
- BZPower Toolbar
- c2cWebdialer
- c2m
- c14pp
- Cache Download
- CacheIt!
- CacheMachine
- Cache Status
- CacheToggle
- CacheViewer
- CacheViewer Fx21
- CadernoVirtual
- Caffeine Security Secure Firefox
- Cahoots
- Calc
- calc-zh
- Calculator-Bar
- Calculator Widget
- Calculator with spreadsheet
- Calendars
- CallBeam
- Callcentric Phonebook Call Indicator
- CallClerk Dial via Firefox
- CallingID Link Advisor
- CallinSearch for searchengines
- Calomel SSL Validation
- Cal St Stanislaus with Personas Interactive
- Camideo Video Search
- CAMKA screen-sharing plugin
- CAMKA Screen Sharing
- Campanoscraper
- Canada-newspapers
- Canadianize
- Canflix Search
- CanImage
- CannaFox Marijuana Add-On
- CantoFish
- Canvas - Make your own Firefox theme
- CanvasBlocker
- Canvas Fingerprint Blocker
- Capital.bg for Firefox
- Capital Trust Markets Forex Intellibar
- Capture & Print
- Capture Fox
- Capture It! Toolbar English Edition
- CardDAV Browser
- Cards
- Cardspace Support for Firefox
- Careclix Enable Screen Capturing in Firefox
- Career2NextOrbit Webinar
- Careplane
- Caret Out
- Carleton University WebCT Multi-Session
- CARM Forums Menu
- Carroll University Theme with Personas Interactive
- cartola-addon
- Cartola dos Cupons Mágicos
- Cas24Play ban evasion
- Casain24ore.it
- Cascade Server Extension for Firefox
- Case Changer
- Casey Case Converter
- cash4brands - Экономь на шопинге!
- Cashback Automator
- CashbackDeals Cashback-Melder
- Cashback Guardian
- Cashback IT-Bestshopping
- CasinoRPG
- CASO Download Manager
- Cassow
- Castle Age Monster Code Opener
- Cat Attack Quick Button
- Categorian for Firefox
- Categorize
- Catster Official Theme and Extension
- Caveat Emptor
- CC
- CCJK Free Translation
- CCR FILES
- CDNPIC remote image uploader
- cecil-fixer
- CensureBlock
- Census Helper Toolbar
- Centenary College Theme with Personas Interactive
- Central de Músicas
- CEOP Toolbar Button
- Cerca Treno Toolbar
- Cert Alert
- Certificate Patrol
- Certificate Watch
- Cert Viewer Plus
- Ceviz-Makale
- chaika
- Chainlove Watcher
- Change
- Change Bookmark Recent Folder List Length
- Change Max Rows of Autocomplete In URL Bar
- Change Profile's Window Icons
- Change Referer Button
- Change Search Shortcut
- ChangingRoom
- Character Identifier
- Characterizer: Japanese and Chinese Reinforcement
- Character Palette
- Chara Enhancement Suite
- Charlotte Hounds Interactive Theme
- Charm for Quora
- Charset Switcher
- ChartLet
- ChartToPDF
- Chase Image Downloader
- ChatZilla
- ChatZilla zh-CN Language Pack
- Check-Host
- Check4Change
- Check All
- CheckBoxMate
- CheckBoxMate Lefedor Edition
- Check for Updates in Help Menu
- CheckFox
- Check My Colors!
- CheckYourTrack - mail tracking tool
- Cheevos for Firefox
- CheharaTime
- Chemistry Reference Resolver
- Cherry Feed
- Chess.com Notifier
- Chess AddIn for FireFox
- ChessGames
- Chicago Bus Tracker
- Chichi Girls Toolbar
- Chickenfoot
- Chicken Scratch
- Child Comment Expander
- Child Lock
- china-newspapers
- Chinaso
- ChinaUnix Forum Menu
- chinaunix hiden tiezhi
- China Weather Panel
- Chinese-Japanese-English Character Hint Bar
- Chinese Language Translator for FireFox
- Ching extension for Firefox
- ChinkBlok
- Chintzee Amazon Price Tracker Get The Lowest Price
- Chinup - Chinese Popup Translator
- Chipmark
- CHIQ
- Chitchatters.net Forums Navigator
- ChmFox
- CHM Reader
- ChodSaUcit
- Choosy
- ChristianMingle Toolbar
- Christmas Holiday Interactive Theme
- ChromaTabs
- ChromaTabs Plus
- Chrome List
- Chrome TRex Easter Egg for Firefox
- Chrome View
- Chromifox Companion
- ChromiGlass
- Chromin Frame
- Chromin Frame Carbon
- Chromin Tab Behavior
- Chupa Folha
- Ciaociao
- CiDeSha
- Cidesha
- Ciiva Search
- CinemaOne Movie Player
- CineMeter
- CipherFox
- CipherFox Secure
- Circle Computer
- Cirilicar
- Ciscall
- Cisco Flip
- Cisco Support Community Toolbar
- Citavi Picker
- Cite4Wiki
- Citebite
- CiteGen
- Cite This!
- CITT
- City info search
- Cityville Exchange
- CityVille Link Exchange
- Ciuvo - Price check in your Browser
- CJ opener
- ClaryIcon Screenshare
- Clasificados_AXCTK
- ClassicFox
- Classicish Add-on Manager
- Classic Opera
- Classic Reload-Stop-Go [Fx45-56]
- Classic Retweet
- Classic Toolbar Buttons [Fx45-56][Tb24-58]
- Clavinuk
- Clean And Close
- Cleanest Addon Manager
- CleanHide
- Clean the junk
- Clean Tweets
- Clean Up Google Music [De-Instant Mix/Radio]
- CleanupTabs
- Clean Video
- Clear All
- ClearAllCookiesButton
- Clear Cache
- Clear Cache Button
- Clear Console
- Clear Dns Cache
- Clear Fields
- Clear File Cache
- ClearForest Gnosis
- Clear Form History
- Clear History
- Clear History by Threads
- clearHTTPStatus
- Clear Input Field Text
- Clear inputs
- Clear Private Data... +
- Clear Recent History... +
- Clear Search
- Clear Search 2
- Clear Search Bar Text On Search
- Clear Site Cache
- Clear Text Fields
- clear the search bar
- ClearWebStats Site Report
- Cleeki - Instant Search
- CLEO
- CleverContacts
- CLGaming_FireFox
- Click&Clean
- Click-to-Dial by Vonage Business Solutions
- Clickability Developer
- ClickALink
- Clickback
- Clickbank Search
- ClickCutter AutoCopy
- ClickCutter AutoSearch
- clickest
- Clickjacking Defense - Declarative Sec Detector
- Clickless Menu
- Click Modifiers
- clickngo
- clicknlearn
- Click Reader
- Click Statistics
- Clickthru.com Scheduler
- Click to Call for Kerio Operator
- Click to play switch
- CliDeSha
- cliget
- Clines
- Clip2net
- Clipboard-Save-As
- Clipboard Observer
- Clipboard Plus
- clipDO
- Clipmarks
- Clippings
- Clipple
- Clip to DEVONthink
- Clip to OneNote
- CliqMeet ScreenShare
- Clique.AI
- Cliqz – search directly in your browser
- clite
- clite-addon
- clite-screenshare
- cLiveChat - Notification
- Clock It In
- Cloquo Event Grabber
- Close'n forget
- Close All Tabs
- Close All Tabs (Reloaded)
- Close Button
- Close last tab with middle-click
- CloSelecTab
- Close Multiple Tabs
- Close NSFW
- Close other tabs
- Close Other Tabs
- Close Other Tabs By Double-Click
- Close Other Tabs Shortcuts
- Close Repeated Tabs
- CloseTab
- Close Tab #
- Close Tab by Double Click
- Close tabs to the left
- Close Tabs to the Right
- Close Tab Toolbar Button
- Closy
- CloudBleed
- Cloudiano
- CloudShopper
- Cloud To Butt Plus
- Cloudworks Screen Sharing
- CL Pics
- Clupedia Toolbar
- Cluster Tabs for Firefox
- Clutterboard
- cmd
- CMD-Q Catcher
- CMS Backend Opener
- CM Send Link
- cmSiteNavigation Toolbar
- CNET Buddy
- CNET News
- CNN IQ Raiser
- CNRI Handle Extension for Firefox
- Co-op Statement Downloader
- CoachforceQA
- Coachforce Screen-sharing extension
- Coaching Pro Screen Sharing
- Coagmento Spring 2015 Study
- Cobalt Box
- Cobra Online Security ATD
- cobrowse
- Cockpit Home Page
- coComment!
- Cocoon
- Code as a Research Object
- CodeBurner for Firebug
- CodeBurner for Firefox
- Codecov Extension
- Codemarks
- CodeNav
- Coder's Calendar
- Coderwall
- Codetch
- CodeViewer
- Codiant Enable Screen Sharing in Firefox
- COED Magazine - Official Theme and Extension
- Coffee Pods Deals
- Cognisec Workspace Firefox plugin
- CoinAbout.com - updated Bitcoin exchange rate
- coindesk prices
- CoinURL
- ColdFire
- Collactive Web Assistant
- College Basketball Interactive Theme
- College Football Theme and Extension
- College Humor - OFFICIAL Theme and Extension
- Colorblind Design
- ColorBlindExt
- Colorblinds Tool
- Colorful Candy Tabs
- ColorfulTabs
- Colorific
- Colorify Firefox
- Color Inspector 3D
- ColorizedButton
- Colorizer
- Colorlicious
- Color Management
- colorPicker
- ColorResults
- Color Scheme Tweak
- ColorSuckr
- Color That Site!
- Color toggle
- Color Transform
- colorXtractor
- ColorZilla
- CoLT
- Column Bookmarks
- Column Reader
- Come back "Block image from ad.sites"
- ComEd Real-Time Prices Toolbar
- Comfort On-Screen Keyboard Pro Extension
- Comic Aggregator Notifier
- Comic Rocket
- Comic Sans Remover
- ComicUpdater
- Command PageUp/PageDown
- commandrun
- CommentBlocker
- Comment Collapser
- CommentsBar - MySpace Comments Add-on
- Comments Filter for Facebook
- Comments for eBay
- Comment Snob
- CommonKey
- Communicator Call
- Commuter Homes London
- Compact Menu 2
- Compact Tabs
- Compare Books Prices
- Compare MoodleDocs
- ComparePricesOneClick
- CompareRaja- Get price comparison automatically
- Compare Video Games Prices at BuyVDOGames.com
- comparez
- Compass - A Table of Contents For Online Shopping
- CompassMenu
- Complete Theme Helper
- Complete YouTube Saver
- ComprarCalcular
- Compress Bookmarks Bar
- Computer-Arts.info Forums Navigator
- com tab
- Concordia U St. Paul with Personas Interactive
- Conductory
- Conduit aka Send to Mobile
- Config Descriptions
- Configuration Mania
- confirm-mailto
- Conform SearchBox(with automatic learning)
- Confuscator!
- Connectify for Infusionsoft
- ConnSets
- Conor McGregor Tribute New Tab
- Conquer Club Speed Turns
- ConquerTell
- ConquerTell4
- ConQuery
- Consciousness Bell
- Console²
- Conspiracy
- Consumer Curiosity
- Consumerify
- Contact Gorilla
- Contao CMS - Backend jumper
- ContensConnector
- Content MathML Polyfill
- Content Scrollbar
- ContextCalc
- Context Font
- Context Highlight
- Context History
- Context Menu Image Saver
- Context Menu Keys for Mac
- ContextMenuPlus
- Context Peek
- Context Search
- Context Search RG
- Context Search Selection
- Context Search X
- Context Style Switcher
- Contextual Google Image Search
- ContinuousWebpageReminderPopup
- Contrast-Finder
- Controle de Scripts
- Convert.Files
- Convert2MP3 - YouTube to mp3
- convert2mp3.net Online YouTube to MP3 Converter
- ConvertMyCurrency
- Convert YouTube to MP3
- Coogle
- Cook County PIN Search
- Cookie Block
- Cookie Button
- Cookie Button in the status bar
- Cookie Context
- Cookie Controller
- CookieCuller
- Cookie Cutter
- CookieExFilter
- Cookie Exporter
- CookieFast
- Cookie Importer
- CookieKeeper
- CookieKiller
- Cookie Manager Button
- CookieMan Context
- Cookie Notification Preventer
- Cookieplux
- CookieRank 1.0
- Cookies Export/import
- Cookies Manager+
- CookieSwap
- Cookie Watcher
- Cookie Whitelist, With Buttons
- Cookie Whitelist for Fennec
- coolerSO
- CoolNovo Search (1)
- Copper (Cu)
- Coprolalia
- copy-code
- copy-formated-url
- CopyAllURLs
- Copy and Go
- Copy and Paste
- Copy as HTML Link
- Copy as Markdown
- Copy as Org-mode
- Copy As Plain Text
- Copy Containing Folder
- Copy Current Page URL with Anchor
- Copy ed2k Links
- CopyFeedLocation
- Copy Fixer
- Copy Frame Address
- Copy HTML
- Copy Link
- Copy Link/Tab Name and URL
- Copy Link as HTML or Markdown Code
- Copy Link Name
- copyLinks
- Copy Links
- Copy Link Text
- Copy Link URL
- Copy On Select
- CopyPageInfo Plus for ScrapBook Plus / XSidebar
- Copy Plain Text
- Copy Plain Text 2
- Copy PlusPlus
- Copy Pure Text
- Copy Real Url
- CopyReflex
- Copyright Infringement Finder
- Copy Selected
- Copy Selected Links
- Copy ShortURL
- Copy Tab Name
- Copy Tab URLs
- CopyTaste Toolbar
- Copy Title
- CopyTitle
- Copy Title and Description
- Copyto / Clever bookmarking
- Copy to Lightning Note for FireFox 3 and higher
- Copy URL
- Copy URL on Mouse Over
- CopyURLs
- Copy Urls Expert
- coral_news
- CoreNotify
- Cornpic.com-host images with right-click
- Corobizar.com - Alerte Live
- Cort Carpenter New Tab Page
- Couch Managers Mock Draft Monitor
- CouchPotato
- CountdownClock
- Countdown Timer
- Counter
- Counter for Mozilla's End of Year Fundraising
- Counterpixel
- Count Word Professional
- Count Words
- Coupon-Follow
- CouponCabin Sidekick - Never Miss Out on Cash Back
- CouponFollow
- CouponJaguar
- CouponMate: Coupon Codes & Deals
- CouponMeUp Coupon Toolbar
- Coupons at Checkout
- Coupons By Domain
- CouponsHelper
- CouponSumo - Coupon Codes Finder
- Couponzclub
- CourseraBrowse
- courseratrops
- cover
- Cover Art Finder
- CoVu
- CozyTag
- CQ Helper
- Craigslist car listing filter
- Craigslist Fusion
- Craigslist Motorcycle buy utility
- Craigslist Peek
- CraigZilla
- Create short URLs
- CREDACIOUS--The Credible Web
- CreditCardNanny
- Criar Cartazes ou Posters de Fotos
- Crisply - Firefox Extension
- CRM-Integration ITSP-PBX Mobile Exchange
- CronZilla
- Crosspost by Symphony
- CruiseControl Monitor
- Cruise Critic Forums Menu
- CryptFire - Encryption made easy
- Cryptiv
- Cryptload Link Copier
- CryptoData
- CryptoFox
- Crystal FS
- CS161 Project Reader
- CSDD-tests
- CsFire
- CSHelper
- CS HLTV
- CS Lite Mod
- CSSFrag
- CSSMate
- CSS Refresh
- CSS Reloader
- CSSsir
- cssUpdater
- CSS Usage
- CSS validator
- CSSViewer
- CsvViewer
- CTB/McGraw-Hill Writing Roadmap 2.0 Secure Browser
- CTC
- CTO WebRTC Screen Capture
- Ctrl+Alt+Del CAD Comic Interactive Theme
- Ctrl+Me
- Ctrl-Z
- CtrlAltDel Navigational Menu
- Ctrl Ctrl
- Ctrl Tab Preview
- Cubbi.es
- Cube
- Cubs Watcher
- CueThat
- CUNY Athletic Conference with Personas Interactive
- Currency Watch
- Current Site IP
- Current Site Search
- CurrentSong
- Curvy To Fat
- CussFeed (clean)
- CustomAppButton
- Custom Badge
- Custom Bar
- CustomBench
- Custom Buttons
- Custom Buttons²
- Custom Download Manager
- Custom Geometry
- Custom Google Search
- CustomItems
- Customizations for Adblock Plus
- Customize about:newtab
- CustomizeGoogle
- Customize Titlebar
- Customize Titlebar v2
- Customize Your Web
- Custom New Tab
- Custom New Tab Button
- Custom Standalone Image Backgrounds
- Custom Tab Width
- customVid
- CuteButtons
- CuteMenus - Crystal SVG
- CuteMenus2
- CuteMenus Classic
- CuteMenus Classic Mod
- Cute Xdebug
- Cutnote Web Clipper
- Cutyfox URL Shortener (bit.ly, is.gd, goo.gl)
- cvalue
- CVPSI
- CyberLeech Addon
- CyberMentors Add-on For Firefox
- Cyberoam Auto Login
- Cybersafety Help Button
- CyberSearch
- CybEye
- CybrHome New Tab | Home Page
- Cycle Collector Analyzer, about:ccdump
- Cycle Input Focus
- Cycloader
- cYMStatus
- Cypher Toolbar
- D2N Agent
- D3 Install Availability Checker
- Dafizilla Table2Clipboard
- Dafizilla ViewSourceWith
- DA Ghost
- Dago Meta Search
- Dai-sy
- dailybibleverse
- Daily Dilbert
- Daily Motivator
- Dailyrando.it Menu
- Daisy Bell
- Dallas Baptist U Theme with Personas Interactive
- dAmnBubbles
- Dam Water Levels Brisbane and South East Queensland, Australia
- danbooru
- Danbooru Downloader
- Daoc Community Navigator
- Dappad notebook sidebar
- DapperFox
- dark.txt
- Dark Background and Light Text
- Dark Backgrounds Switcher
- Darker Background Brighter Font
- Dark Facebook Theme
- DarkWDec (discontinued)
- Dark YouTube Theme - Black Skin for YouTube & FB
- Das Örtliche
- Data:URI
- Data Analytics
- DataFox
- DataSheet Fire Finder
- Datasheet Lookup
- DataVault Extension
- Date a Millionaire - Official Add-on
- Date difference and Age calculator
- Date Picker/Calendar
- Dating Accelerator
- Davenport U Theme with Personas Interactive
- DayMarks
- Daytona International Speedway - OFFICIAL Theme
- Dayviews statusbar
- DBGbar
- DblClicker
- Dcurrency
- Ddlfantasyforum
- DDReader
- De-cliseificatorul
- Dead Link Checker - MirrorChecker.com
- Dead Phish
- DealMine - Compare prices, discounts & rewards
- dealnews Sidebar
- DealsPricer
- Debian buttons
- DebridFF
- DebugLogger
- Decentraleyes
- Decilo Gratis
- Decreased Productivity
- deduplicate-tabs
- DeeperWeb - Boost and Customize Google Search
- Deepmemo
- Deep Search Engine
- Deezer feed cleaner
- deface
- Default Search Engine
- DefaultSize
- Define
- define-word
- DefineIT
- Define Word
- defyFormValidation
- DeinAnteil.at Sparmelder für Online-Shops für österreichische Kunden
- DejaClick
- dejaSpace It !
- del.icio.us buttons
- del.icio.us Complete
- del.icio.us IncSearch
- del.icio.us Lite
- del.icio.us One-Click Delete
- del.icio.us post
- DelaySites
- Delete Bookmark Icons
- Deletebutton
- Delete Site History
- Delicious Pick
- deliGoo - Delicious (del.icio.us) Search Engine
- Demandware
- Demo Plugin
- Deng Google Bookmarks
- DenverLibPlus
- depannage informatique
- De Partijpolitiek-filter
- Depeche Mode Sk Browser
- Der Artikeltrainer
- Derek - Dirty Boxers Affiliate Redirect
- Der Mundo
- derp.co.uk Image Uploader
- Derpy.me Link Shortener
- DesertOperationsTools
- DeskCam
- deskCut
- DeskSMS - Send and Receive Text Messages
- DeskTime url fetcher
- Desktop
- Desktop Messenger for Telegram™
- DestinyReddit
- Destroy the Web
- Desvira Link
- Detik Langsung
- DeTiny Short Url
- Deuterize
- Devanagari fonts package
- Dev Buttons
- Developer Assistant
- Developer Extension for OpenSocial
- Developer Profile
- Developer Toolbar
- Developer Tools - toolbar button
- deviantAnywhere
- Deviant Love
- DevPrefs
- DevSearch
- DevTools Auto Open
- DevTools Prototyper
- DevTools Toolbar Items
- DEX toolbar
- DFOL
- DGS Check
- Diablo 3 profile +
- diablo3extendedstats
- diaspora* Advanced Sharer
- DiB
- DiCE Translator
- Dicionarios de Galego
- Dict
- Dict.cc Translation
- dictCheck
- DictCN
- Dictionary
- Dictionary (EN/DE)
- Dictionary (Google™ Translate) Anywhere
- DictionaryFox
- Dictionary Lookup Extension
- Dictionary Pop-Up by Dictionary.com (Official)
- DictionarySearch (Official Version)
- Dictionary Switcher
- Dictionary Tooltip
- DictSearcher
- DictsInfo
- Did I have it?
- Die2Nite Enhancer
- Die2nite map tool updater
- Die2Nite Ratio
- die2nite Utilities
- DieselPlace.com Toolbar
- Diet To Yum
- Diet Watch
- digdrop - Amazon price drops digger
- Digg.com Comment Spotlight
- Digger
- Digger Reloaded
- Digger Reloaded 2
- Digg Extension for Firefox
- DiggiDig
- Digg Sidebar
- Digg This!
- DiggThumbs
- Digg Toolbar
- Digifan Ekle Destekle
- Digitalcare Screen Sharing
- Digital Point Forums Search or Jump
- DigitalPoint Forums Toolbar
- Digmyweb
- Digraphs
- Diigo Web Collector - Capture and Annotate
- Ding.pl
- Diplomski rad
- Direct-Download Links Checker
- Direct.Fastix Alpha
- Direct Currency Converter
- Directgov Search Bar
- Direct Link
- Direct Media Access 4 AlloStreaming (AlloShare + AlloShowTV)
- DIRECT PDF DOWNLOAD
- Direct Torrent Downloader
- directUC
- Dir Up
- Disable about:config
- Disable Add-on Compatibility Checks
- DisableBackspaceNavigation
- Disable Ctrl-Q Shortcut
- Disable HTML5 Fullscreen Alert
- Disable HTTP Referer at Startup
- Disable Links
- disablemenu
- Disable Private Browsing
- Disable Private Browsing Plus
- Disable Style Button
- disable tabs on top
- Disable Visited Links
- Disable WebRTC
- Disable xat chat or profile CSS
- disallow Script Button
- Discard.email - Your disposable e-mail address
- Disconnect for Facebook™
- Disconnect Search
- DiscountDroid by ClipperHappy.com
- Discount Helper
- Discreet Tab Badge
- DiseaseNavi
- DiskusijeNET toolbar
- Display Text Directly
- Display Window Title
- Disposable Temporary E-Mail Address
- Disrupt to Bullshit
- Distill Web Monitor - Legacy
- Distinctive
- Distrust
- dlTracker
- DM BBCode Extension
- dmlite
- DMOZ Bookmarks
- dM TabCounter
- DND Flavor Inspector
- DNIePasswordManager
- DNS Cache
- DNS Flusher
- DNSQueries.com Toolbar
- DNS Report
- DNS Saver
- DNSSEC/TLSA Validator
- DNSStuff Mobile
- DNSStuff Toolbar
- docked JS-Console
- Dock Progress
- Doctor Who Tribute New Tab
- Document Map
- Does Amazon Ship to ...?
- Does Creatine Work
- Doge2Doge
- Dog Ears
- Dogecoin extension
- Dogecoin FUD Eraser
- DogeMail
- Dogfood
- Doi 4 Wok
- DOI Search
- Dojo Firebug Extension
- Dollar2Rupee Rate
- Dolphy
- Domainav
- Domain Availability Search - DomainExtension.org
- Domain Cage (SK Mod)
- Domain Details
- Domain Espionage
- domainFinder
- DomainHistory
- Domain Lookup
- Domain Pass Lite
- Domain Switch
- Domain Whois for Firefox™
- DOM Counter
- DOMCrypt
- DOM element as a bookmark
- DOM Element Counter
- Domen
- Dominant Color
- Dominion Full Card Display
- DOM Inspector
- DOM Inspector Plus! [dm]
- DOM Inspector Toolbar Button
- DomOf.com, SEO Analysis
- Don't Be Evil
- DON'T PANIC
- Don't Read The Comments!
- Donbaleh Assistant
- donorpreview
- Do Not Auto Activate Pinned Tabs
- Do Not Fool
- Do Not Save Password
- Dont Lose Your Query
- DontPhishMe
- Doocle Screen Sharing Extension
- Doom9 Toolbar
- Dorando keyconfig
- dorktools
- Dormancy
- Dot.LC - Quick Link Generator
- dotCOMplete
- Do This Automatically
- dotHIV - the digital Red Ribbon
- dotjs
- dou-sort-comments
- Double-click To Reload Tab
- Double-Click to Reload Tabs
- Double Click Add New Tab
- Double Click Closes Tab
- DoubleClick ContextMenu
- DoubleClick Save Picture
- DoubleClickSearch
- Download Box
- Download Cleaner
- Download Embedded
- Download Flash and Video
- Download generated CSV file
- Download Manager Tweak
- Download MP4 videos from Youtube
- DownloadNow.net - Add files button
- Download Panel
- Download Plan
- Download Profiler
- Download Scheduler
- Downloads Context Menu
- DownloadsInMenubar
- Downloads in Tab
- Download Sort
- Download Sound
- Download status
- Download Statusbar (3.x)
- Download Statusbar (4+)
- Downloads Toolbar Button
- Download Timestamp
- Download Unlimited
- Download Videos From YouTube
- Download with youtube-dl
- Download Youtube Video
- Download Youtube Videos HD 1080p, Megavideo, Dailymotion, Vimeo, Metacafe, etc.
- DownThemAll!
- DownThemAll! AntiContainer
- Downtweet
- DPC bar
- DPLi Shorten URL
- Dr. Body Narrow
- Dr. Lookup
- Dr. Music Contact
- Dr.Web LinkChecker
- Drag & Drop.io
- Drag & DropZones
- Drag-2-Move
- Drag-Select Link Text
- drag2up
- Drag And Open
- Drag de Go
- dragdropupload
- DragIt (formerly Drag de Go)
- DragNDrop Toolbars
- Drag Tab as Shortcut
- DragToScroll
- DragUrLink
- DraugiemFox
- draugiemMusic
- DrDOM
- Dream It
- Dream YouTube Downloader
- Drew University Theme with Personas Interactive
- Dribbble New Tab
- Droid Manager
- Drop a Hint
- Dropdo
- Dropfox
- DrudgeSiren
- Drupal For Firebug
- DSBMarks
- D Sharp
- Dsi Portal Navigator
- DSLR Notifier
- DSLR Notifier 2
- DSTimer
- DTK Forums Menu by |DtK| [C] Squall
- DT Whois
- Dublin Core and eGMS Viewer
- Dublin Core NeViewer
- Dublin Core Viewer
- DuckDuckBang
- DuckDuckGo Privacy Essentials
- Duke University Blue Devils Interactive Theme
- Dummy Form Filler
- Dummy Images
- Dummy Lipsum
- Dupe Checker
- Duplicate 2 Window
- Duplicate in Tab Context Menu
- Duplicate Tab
- Duplicate Tab
- Duplicate Tab (in Private mode as well)
- Duplicate Tab Closer 1.0
- Duplicate Tab Hotkey
- Duplicate This Tab
- durl
- Dust-Me Selectors
- Dustman - AutoClose Tabs
- DUU: DukItan Usher Url
- DxSEO
- Dympol Discount Entertainment
- Dynamic URI changer
- Dynamic Web
- Dynamite Deals
- DZone Voting
- e-Graphite
- E-vizio.com Forum Jump Menu
- e2sin - Converter
- E4ZUNE | COPYLINK
- e107 Dev
- Earth Observatory NewTab
- Earth Science NewTab
- Ease Link
- Easiest YouTube Video Downloader
- East Asian Translator
- Easter Interactive Theme
- Eastern Kentucky U with Personas Interactive
- Eastern Michigan U Theme with Personas Interactive
- East Texas Baptist University Interactive Theme
- Easy-Price
- EasyAccent
- Easy App Tabs
- Easy Battery Monitor
- EasyCal
- Easy Calc
- EasyCharity
- easyComment
- Easy Context Search
- Easy Copy
- easycrypt
- EasyDiscount
- Easy DragToGo
- EasyFa
- Easy GA
- easyGestures N
- Easy Google Links
- Easy Google PageRank Checker, Simple and Fast
- Easy Google Page Translate - For Firefox
- EasyHire.me Screen Sharing Add-on
- Easy JsBin
- Easy Markup
- easyMath (aka Insert Symbol)
- Easy media download
- Easy Notes
- easyOpen
- Easy PHP
- EasyProxy
- Easy Read
- easyScroll
- Easy Search
- easySearch
- EasySinhala
- EasyTamil
- easy Xdebug
- Easy YouTube mp3
- Easy YouTube Theme Maker, Easy,Fast And Simple
- EasyZoomProxy
- eazyhomepage
- EazyPaper Zotero integration
- Eazyzoom
- Ebates: The Free Cash Back Shopping Assistant
- eBay - Item description - Item prosecute
- eBay - Item Description - Save Enlarged Pix
- eBay - Item Description - Show Seller Location
- eBay - Motors - Save Enlarged Pix
- eBay-Searchresult List-Fullsize and remove Popups
- eBay - Watch List - Show End Of Auction
- eBay.de Quick Search
- eBayBuddy
- eBayBuddy Australia
- eBayBuddy UK (United Kingdom ebay.co.uk)
- Ebay Button Test Extension
- eBay Ends
- eBay for Firefox
- Ebay Fusion
- eBay Show Missing Images: Show missing preview images on ebay.de
- eBay Worldwide - Currency Converter - Calculator
- ebookers Travel + Weather + Currency + Calculator
- eBook PDF Search Engine and Online PDF Viewer
- Ebook PDF Search Engine and Viewer Toolbar
- eCalculator
- eCash URL Shortener
- Eccountability Screen Sharing Extension
- eCleaner
- ECM Toolbar
- Eco-Friendly Theme and Extension
- Economic Data
- Ecosia — The search engine that plants trees!
- eCurrency
- EdgeWise
- Edit and Note
- Edit any page
- Edit Bookmark Minus
- Edit Bookmark Plus
- Edit Cookies
- Edit Middle
- Edit Page
- EditPage
- EditPrefs
- Edit Source
- Edit Tab Titles
- EditTXT
- editURL
- eFirefox
- eGun - Modification
- Egypt-newspapers
- EHTip
- EiffelProjects Website Redirection
- eightPuzzle
- eiktub Arabic
- ej.uz saīsinātājs
- EKCKO
- EKO dEs GARriGuEs - Avant-Garde French Radio (On Air)
- eksi-arama
- eksi futbol
- Eksigator
- Eksi News
- eksi sozluk arama - search in eksisozluk
- Ektron Drag Drop
- Elaborate.io
- Electoral College Monitor
- elefant.ro Toolbar
- Elegant Scrollbar Cursors
- Element Hiding Helper for Adblock Plus
- Element Hiding Helper for Pan
- Element Inspector
- Element Properties
- eLert Blog
- elevenia
- ElfBite
- Elite Proxy Switcher
- Elizabethtown College with Personas Interactive
- Elliot! Search
- Ello
- Elog.io Browser Extension
- Elon University Theme with Personas Interactive
- Emailage Fraud Risk Email Analyzer
- Email Guardian
- Email Language Proofreading & Grammar
- Email Link button
- Email Notifier
- Emailsensei
- emailStationery.com Toolbar
- Email tester
- Email This!
- Email Yourself!
- Embedly
- EMD Snitch
- EM Menu
- Emoji Cheatsheet
- Emojis New Tab
- Emoji Stickers Postcards Emoticons
- EmotiConverter
- Empathy Extension (Kenya)
- Emporia State U Theme with Personas Interactive
- Empty Cache Button
- Emuflex (Emulator for flexible display devices)
- eMuleSearch
- eMule Web one-click
- Emurse.com Resume Quick Send
- Enable Bookmark All Tabs
- Enable Google Inbox (obsolete)
- Enable Screen Capturing
- Enable Screen Capturing for Daiscon Webinar
- Enable Screen Capturing for YOUSEEU
- Enable Screen Capturing in Firefox
- Enable Screen Capturing in Firefox
- Enable Screen Capturing in Firefox for Teddy
- Enable Screen Sharing in Firefox
- Enable WhatsApp Web
- Encontre seu Pacote
- Encrypted Communication
- Encrypt Image
- Endnote
- Enforce Encryption
- Engin Pressa
- English-Bulgarian Dictionary
- English - Spanish - German Dictionary Toolbar
- English into Urdu Translate
- English to Bangla Dictionary
- Enhanced Feed Preview
- Enhanced Middle Click
- Enigform
- Enjoy Reading
- Enlaces al arca ya!
- Enlight
- Enliken
- Enlocked
- enMailing
- Enonic CMS Server Trace
- Ensighten Developer Tools
- Enter elements (deprecated)
- Enter Selects
- Enter The Matrix
- Entropass
- Environment Proxy
- Eortologio - Greek Namedays Calendar
- Eoszilla
- ePhotoUploader
- EPUBReader
- eQuakeAlert!
- eQuake Alert II
- Equity Pilot - The Stock Market Navigator
- ERail Plugin for Firefox
- Eraser
- erina59snap
- Ermis CMS Security Scanner
- Error Console
- ErrorHelp: Search Engine for Errors
- ErrorZilla Mod
- ErrorZilla Plus
- Escurçador Ves.cat
- eShopper 1.0
- ESMART Token PKCS11 module
- ESPN Cricinfo
- eSportHeadlines.com Toolbar
- eSports New Tab
- esri
- Essential Baby Items Deal Tracker: Diapers/Formula
- Essential Household Items - Paper and Plastic
- ESVBible.org Exporter
- Etacts Gmail Plugin
- ETNote
- Eu quero IBAGENS
- Euro Football / Soccer Interactive Theme
- EuroNews NewTab
- Euskalbar
- EVE Fox
- Evernote Web Clipper
- EverSync - Sync bookmarks, backup your favorites.
- EVE Status - Quick View
- Evidence Scribe
- Evolution Classic Toolbar
- eWall NewTab
- eWebMail Plus!
- Ewhois
- EW Super Scouter
- exbii.com Toolbar for Firefox
- Exchange BNR
- exchange rate converter
- exchange rate converter and calculator
- Exchange Rate List
- Excudo Startpage Bookmarker
- Execute JS
- Executive Road Warrior Web Defender
- Exede Analytics
- ExExceptions
- ExHentai Easy 2
- Exif Viewer
- Exify
- Exit Button Firefox
- Expand Short Url
- Expenses in Torch Project Management
- experimental browser
- expert
- Expire history by days
- Expiry Canary
- ExponentCopy
- Export All Certificates
- Export Bookmarks
- Export Cookies
- Exporter
- ExportHTMLFolder
- ExportToCSV
- Exposure New Tab
- express100
- ExpressionEngine Detector
- Expression Evaluator (using BODMAS)
- Expression Evaluator (using BODMAS)
- ext-youtube
- extEMM
- Extended Cookie Manager
- Extended Copy Menu
- Extended Keyboard
- Extended Link Properties + (obsolete)
- Extended Statusbar
- Extensie de test
- Extension Auto-Installer
- Extension Conflict Troubleshooter for Firefox
- Extension Defender
- Extension List Dumper
- Extension Manager Extended
- Extension MonstersGame
- Extension Test
- Extension Tracker
- Extensão Globo.com
- External Application Buttons 2
- Extinctor
- Extra Content V.I.P.
- Extra Padding When Maximized
- Extrasafe
- ExtremeShooter
- EyeBus Vancouver
- eyedropper Button
- Eye in the Sky
- eyesight check
- EZ Drag-n-Drop
- EZNav
- EZproxy Helper
- Ez Sidebar
- F.B. Purity - Cleans Up Facebook
- F1 Project Post Beautifier
- F1Project Drivers Roster
- F2S2 Menu
- F21 Current Stock
- F64 Voting Button
- F1000 Browser Extension
- FabTabs
- fabulloso!
- Fabza Shopping Assistant Toolbar
- Fabza Toolbar in association with Sprinkle.co.uk
- Facebar
- Facebook.Censor
- Facebook Application Bookmarks
- Facebook Beacon Blocker
- Facebook Chat Bracket Emoticons
- Facebook Chat Tapuz Emoticons
- Facebook Click
- Facebook Extra Links
- Facebook Font Size
- Facebook Opener
- Facebook Photo Stalker
- Facebook Privacy Relabeller
- Facebook profile pictures
- Facebook request
- Facebook Search Extension
- Facebook Tincan Status Update
- Facebook usability suite
- Facebook Web Forum
- Facebook zoom picture
- Facedown
- FaceFont : Emoticons and Facebook notifications
- FaceLeaks
- Face Search Add-Ons
- FakeFinders.net Search Toolbar
- Fake Vedio AD
- Fake Windows Version for Useragent
- Famous Adage
- Fancy
- Fancy Numbered Tabs
- Fancy SA Forums
- FancyText
- FanFic Filter
- FanFictionDownloader
- Fangs Screen Reader Emulator
- Fantastic Beasts Tribute Tab
- Fantasy Football Rankings and News
- Fantasy Sports Interactive Theme
- Farkit
- Farkode
- Fark Tags
- Farky
- Farsi Instant Translator (FiT)
- Fashflog.com flog button
- FAskin
- FASQu Bar
- Fast and Furious New Tab Theme
- FastAwesomeBarSearch
- Fast Close Tabs
- Fastcraft - Last 5 Commits
- Fast Delete
- Fast Dial
- Fast Dial All Versions
- FastDic
- Fast eBay Search
- Fasterfox
- Fasterfox Lite
- Fastest Search - Browse/Search Faster!
- Fast Image Blocker
- Fast Image Research
- FastPrevNext
- Fast QR Code Generator
- Fast Search by Surf Canyon
- Fast Switch to Asana
- FastTrack
- Fast Translate
- Fast Translation
- fasTun Tool
- Fast Video Download
- Fast Weather
- FastYub!
- FatCash
- FatPipe Downloader
- Faved Toolbar V1
- Faves
- Faviconiac Search Engines
- FaviconizeTab
- Favicon Picker 2
- Favicon Picker 3
- FavIcon Reloader up to FF 48 only
- Favicon Restorer
- Favicon Tabs
- Faviror 1.0
- FavLoc
- Favmarks
- Favorites (Selenium IDE)
- FavTab
- FAYT Revived
- FB2 Reader
- FB Chat Bully for Firefox
- Fb chat Faces
- FB Chat History Manager
- FB master
- FB PhotoTheater Killer
- Fb Profile Visitor
- FBSecure
- fbtopoffeedbutton
- fb_ad_hide
- FDA Search
- fDebug Client
- fdw-skin
- FeatureFix
- FEBE
- Feed2Mail
- Feedbackfox
- FeedBurner Subscribers
- FeedGhost Add-On
- Feedly - Beyond Google Reader
- feedly-tabs
- Feedly Notifier Plus
- Feed Sidebar
- Feedspot Notifier
- Feeling Lucky
- Ferrari Add-on for Firefox
- FetchMP3 Video to Audio Converter
- Fetch Text URL
- Fetch Text URL (fix version)
- Fetion in Firefox
- ff-autoredirect
- ff-PushMessenger
- FfChrome
- FFClickOnce
- ffclipboard
- FF Fullscreen
- FF History
- FFMyIP
- FF Rocker
- FF Screen Capture Gaurav
- ffwiki
- FFXI Finder
- FFXI Helper
- FFXIV Lodestone Item Level
- ff_screenshare
- Fhu Feliratkereső (myepisodes.com)
- fi
- Fibotin
- FIDPlus
- Fierita Links
- Fierr
- FIFA™ Panel View
- figuresummarizer
- File and Folder Shortcuts
- File Downloader
- FILEfox
- File Logging (Selenium IDE)
- Filename2Caption for Picasa Web Albums
- Fileslap
- FileSonic Search Toolbar
- File Title
- FillForms
- FILMEGO
- Film Info and Reviews
- FILSH.net Plugin
- Filtered clipboard
- Filter Extensions
- Filter Uploader for Adblock Plus (unofficial)
- Final Screen Capturing Gaurav
- Finance Extractor
- Finance Toolbar - Real Time Stock Tracker
- Financial Assistant
- Find-a-Book in the Brooklyn College Library
- Find-A-Record
- Find All
- Find and Replace for FireFox
- Find At AppShopper
- Findbar Favorites
- FindBar Tweak
- Find Button
- finder.com.au Anywhere
- Find Image Copies
- Find in Frame Hack
- Find In Numbers
- Find In Tabs
- Find in this Selectbox...
- FindList
- Find on XING
- Find Preferences
- Find similar images by google.ru
- FindThatBand
- Findx
- fineBook
- Finetuna
- Fingerfox (SE)
- Fingertip
- Finitimus
- Finland-newspapers
- Finnish spellchecker
- FIRe-text
- FireBall
- FireBible
- Firebomb
- FireBreak
- Firebug
- Firebug Autocompleter
- Firebug MarkLogic Developer Console
- Firebug Net Panel History Overlay
- Firebug Paint Events
- fireburst (1)
- FireCal
- FireCaptor
- Fireclam
- Fireclip
- FireClosure
- FireCoin
- FireColour
- Fire Commander
- FireCompass for Firebug
- FireConnect
- Firecookie
- Firecoral
- FireCsv
- FireCurl
- FireDictionary
- Firediff
- FireDotLess
- Firedrive for Gmail - Email Large Files
- FireDroid
- Fire Eagle Updater
- FireFile
- Firefinder for Firebug
- firefix
- firefixx
- Fireflix
- FireFlow
- Firefly
- Firefocus
- Firefogg
- FireFontFamily
- Fireforce
- fireform
- Fireformat
- Firefox button looks like Shiitake
- Firefox Lightbeam
- Firefox Multi-Account Containers
- Firefox Pedophile Reporter
- Firefox Reading list - Noosfeer
- FireFox Tweak
- firefox_addon_proxy
- FireFTP
- FireFTP button
- FireGestures
- Fire IE (FireIE, Enhanced IE)
- FireIFrame
- Fireinput
- FireJSOD
- Firelang
- Fire Launcher
- FireLESS
- FireLink - Copy link with keyboard shortcuts
- FireListonic
- FireLogger
- Firemacs
- FireMath
- Fire Media Player
- FireMobileSimulator
- FireMule
- FirePath
- FirePhish Anti-Phishing Extension
- FirePHP
- FirePic
- Firepicker
- FirePin
- FirePlurk
- Firepost
- FirePreview
- FireProxy
- FireQuery
- FireRainbow
- FireReads
- FireRun
- FireSaver
- Firesay
- FireSDMX
- Firesize
- Firesizer
- FireSnarl
- Firesomething
- FireSoup
- FireSSH
- FireSteg
- FireStorage
- FireStox
- FireStylus for Firebug
- FireSwitch
- firesymfony
- Firetag
- FireTitle
- FireTrack
- FireTray
- FireTray
- FireTube (Youtube Music Player)
- FireViking
- Firevine Toolbar
- FireWeasel
- FireWebSSO
- Fireword Gen
- FireX Proxy
- FishEyeTabs
- Fission
- FitBolt for Firefox
- Fit Bookmark Icon
- fix-ml
- fixed scroller anywhere
- fixedzoomthumb
- Fix for bug 469082
- Fix GossipLanka
- fkaddon
- Flagfox
- FlagTab
- Flare.me Image Hosting Addon
- Flash-HTML5 Player for YouTube™
- Flashback Menu
- Flashblock
- Flash Block
- Flash Block (Plus)
- Flashbug
- Flash Control
- Flash Debugger
- FlashDisable
- FlashFirebug
- Flash Game Maximizer
- Flash Gestures
- FlashGot Mass Downloader
- FlashInspector
- Flash Killer
- Flashlight
- Flash OnOff
- FlashResizer
- Flashtoggle
- FlashTracer
- Flash Video Downloader - YouTube HD Download [4K]
- Flat Bookmark Editing
- Flat Bookmarks
- FlatStyle
- flbook
- FLC Link
- Fleck - Save the best of the Web
- Flem
- Flesko
- Flex-Pilot-x
- FlexBar
- Flexi eBooks
- FLEX – Favslist Expansion
- Flickr Buddy
- Flickr Eyebrow Shaver
- FlickrFox
- Flickr Gallery Plus!
- flickrgethighrez
- Flickr NewTab
- Flickr Open
- flickr original
- FlickrSharing
- Flickr Size Pickr
- Flimby
- FlipClock
- Flip Image
- Flip or Rotate Image
- Float View for Youtube.
- Floaty Scrollbar
- FloraQueen
- Floraqueen ( DE )
- Floraqueen ( ES )
- Floraqueen ( FR )
- Floraqueen ( IT )
- Floraqueen ( PL )
- Flow
- flowfox
- FLST
- FLST (Firefox 4+)
- FLST (Firefox 29+)
- Fluent CFD Search
- Fluid twitter layout
- fluschipranie
- flv movies downloader
- FLW Fishing Theme and Extension
- flybar
- FMix
- FnotePad
- FOAFox
- FoBo.ru Driver
- focus@will hotkey
- FocusBlocker
- Focus Firefox for Facebook
- Focus Follows Mouse
- Focus Keyboard
- Focus Last Tab
- Focus on the User - Local
- Focus Options
- Focus Regainer Lite
- Folder Extension Wizard
- folkd
- Follow That Page
- Folloyu Add-On
- Folol Reporter ( Egyptian Revolution )
- FoneraDownloader
- Font Conversion
- Font Finder
- fontinfo
- FontMag
- Font Size
- Foobar
- Foobar Controls
- Food and Calorie Finder
- Foodlve.com
- Foodlve Daily Diabetes Diet
- Football Interactive Theme - track your NFL teams!
- Footnotify
- Force-TLS
- Force Addon Status
- Force Content-Type
- ForceLoadTabs
- Force RTL
- Forecastbar Enhanced
- Forecastfox (fix version)
- Forecastfox Weather
- Forex Currency Converter
- Forex Fox
- For Human Eyes Only
- ForLazyPeople Image Uploader
- Format Javascript
- FormBug
- Form data generator
- FormFox
- Form Grinder
- Form History Control
- FormInfo
- Form Jig
- Formlet
- Form Saver
- Fornesia Forum ToolBar
- Forum.hr Forum Meni
- forum.roerich.com Toolbar
- Forum Additive
- Forum Fixer
- Forumite's Friend
- Forum Photo Sidebar
- Forum Preview
- Forumsigs Image Uploader
- Forum Tags PLUS (Image tags)
- Forwarding to the available information resources
- Forès
- Fosdem Basic Protocol Handler(fosdem:)
- Fotofox
- Foundstone HTML5 Local Storage Explorer
- Foursquare Checkin
- foursquarefox | foursquare for Firefox
- Fownce
- Fox!Box
- FoxAge5ch
- FoxAmp
- FoxChat Online
- FoxClocks
- FoxDen Desktop Screenshare
- foxdoc
- FoxE9
- FoxFilter
- Foxfiltre
- FoxFon
- FoxGame
- FoxGuide
- foxiFrame aerosnap
- foxiFrame basic
- Fox Input
- foxlinks
- FoxLocation
- foxmeter
- Fox Notifier
- FoxReplace
- Fox Restart
- FoxSaver
- Fox Splitter
- Fox Splitter (formerly Split Browser)
- FoxStocks
- FoxTor
- FoxTorrent
- FoxVox
- Fox Web Security
- FoXWiki
- foxy-calc
- Foxy Detective
- Foxylicious
- FoxyMeter
- foxyNotes
- FoxyPrices
- FoxyProxy Basic
- FoxyProxy Standard
- FoxyQuotes
- Foxy SEO Tool
- FoxyShack
- FoxySpider
- FoxyTab
- FoxyTracks
- Foxy URL
- fragment
- Fragment Titles
- FrameExt
- france-newspapers
- FrazeIt
- free-control
- FreeDictionaryPopPanel
- Free Discussion Anywhere
- Free Ebook PDF Search Engine Toolbar
- Free eBook Search
- Free Games
- Free Gifts
- FreeLemonade: A Guide to Your Medical Condition
- FreeMint - Browse and Earn
- Freenode IRC Client
- Free OmniGraffle (.graffle) Viewer
- FreeOnes Search ToolBar
- Free Quick Translator
- FreeShare Image Uploader
- FreeTranslate
- Free_College_Homework_Help
- Frelic Helper
- Fresh CSS
- FreshImg Image Uploader
- Fresno Pacific U Theme with Personas Interactive
- friend.ly Contest Revealer
- Friendbar - The Twitter and Facebook Toolbar
- FriendID
- FriendzForLife ForumNavigator
- Frienony Chat
- Fritz!BoxDial
- Froggr
- FromWhereToWhere
- Frontier forums moderation tools
- FRoSP
- Frostburg St U Theme with Personas Interactive
- Frumentari search
- Fskills
- Fukken Saved
- Full-screen NBN Rollout Map
- Full Cal
- FullerScreen
- Full Map
- FullRip.net Youtube Mp3 converter/Video downloader
- Full Screen
- FullscreenBorder
- Full Screen Homestar Runner
- Fullscreen Maps
- Full Screen Status Bar
- Full Session History
- Fullsize Image viewer for GooglePlus
- Full Web Page Screenshots (♥♥♥♥♥)
- Funny Junk Image Fixer
- Furaffinity Download ext-fixed
- Furaffinity Download extension
- FurAffinity Extender
- Furaffinity Little Helper
- Furaffinity Preview
- Furaffinity Submissions extension
- Furjournal Extension
- Furk.net BitTorrent Proxy
- Fusebox 5 Reload
- Futebol - placar ao vivo
- Fuzzy Time
- FxClickOnce
- fxdpi
- FxIF
- FxKeyboard
- FXPCodeFox
- FxPro - Forex Tools for traders
- FxPro: Инструменты Форекс Трейдера
- FXTROLL
- fzami - Muslim Prayer Times Plugin
- FZS MyVIP Plus
- G! SafeSearch Off
- g15firefox
- GA? - Is Google Analytics Installed
- Gaiabar
- GaiaFormat
- GaiaOnline Avbar
- Galaxytoolbar
- Galculator (statusbar version)
- Galculator (toolbar version)
- Galipabi Forum Menu
- Galleropa
- Game Debate PC System Requirement Tool
- GamEffective
- GameFOX
- GameLinkExchange
- Game Monitor
- Gamer's Control
- Gamer.Ru Profile
- Gamer Tools
- Gamespot Menu
- GamesRadar.it Menu
- GamesToolsBR
- GameWisp Badges
- GamingGutter's toolbar
- Garitas BC
- Garmin Communicator
- GasBuddy Toolbar
- GatewayBlack Toolbar
- Gathera - AOL, Gmail, Hotmail
- Gatherer Clipboard Search
- Gayburg Slice
- GazoPa Similar Image Search
- Gb2Big
- gbimg.org Rightclick Image Uploader
- gBing
- GBookmarks (Google Bookmarks for Firefox)
- GBookmarks via Right Click
- Gcache+
- GC Menu
- G DATA Linkchecker for Mac
- gdict
- GDirections
- gDocsBar
- Geckomenu
- Geeks Toolbar
- Generate Numly Copyright
- Generic CSS Loader 2
- Genome Toolbar
- Geo
- GEO2Enrichr
- geo: URI scheme handler
- Geocaching.com GPX Downloader
- geo devtool
- Geodik Toolbar
- Geography Puzzles
- GeoInfo Map - Quick Location Search Add-on
- GeoLocateFox
- Geolocater
- Geolocation
- GeoNames Context Menu
- German-newspapers
- geschenker.net: present url button
- Gesture Translate
- Get Archive
- GetAttention
- GetBoo
- GetCache
- Get Company Info
- Get directions from Google Maps
- Get File
- Get Files By Email Helper
- Get File Size
- Get Html Elements of any web page
- Get Image From Facebook
- getImages
- GetItFromFIT
- Get It Later
- GetLink for Downloader
- GETREED
- getScoutApp
- Get VCM Id
- Gfire WebGame Detection Plugin
- GG.GG URL Shortener
- GGFirewall
- Ghostery – Privacy Ad Blocker
- GhostText For Firefox
- Ghoztcraft Menu
- Giant Bomb Season Pass
- GicExt
- Gif Block
- Gifdo Button
- gifsauce
- Giftag
- Gift Card Score - ScripSmart
- Giftry
- GIFTULA Free Universal Gift Registry
- GiftWisdom
- Gigaw.at
- Gikodio's Destiny Add-on
- GIKRadio
- Gild Browser Extension
- gimload
- GIO HYIP Analysis
- GiPSy Flight Manager
- Girl in Wonderland
- Girls' Generation SNSD Interactive Theme
- Girls with Slingshots Interactive Theme
- Gish It!
- GISS Google Image Search Size Indicator
- Gitcolony QA
- Github+Travis
- github-addon
- GitHub Contribution Hider
- GitHub issues extension
- GitHub Repo Widget
- GitHub Selfies
- Github Shortcuts
- GitHub submodule links
- Github tweaks for Bugzilla
- Githubzilla
- give-me-a-commit-message
- Give as you Live Donation Reminder
- GiveBuy
- Givinci
- gladder
- Gladiatus Crazy Add On
- Gladiatus Tools
- Glasser
- Glasser Pojo
- GlassMyFox [Fx29-56]
- Glauca
- Glazoom
- gleeBox
- gliider
- G Links
- globalChrome.css
- Global Notes
- Globalproxy addon
- Global Search Extension
- Global Twitch Emotes
- GlobalZoom
- Globefish Instant Translator
- Globish2.Space
- Glob Toolbar
- gloCOM Call
- Glosssary
- Glue - Recommendations for Books/Movies/Music
- GLUG-DSCE
- GlumboIMG
- Glydo CNN Addict - Get Related News and Top Headlines from CNN
- Glydo Related YouTube Videos
- Glydo Shopping - Save Money and Get Related Offers and Reviews
- gm-mafia
- Gmail - Add Row Highlights
- Gmail - Hide Invites
- GMail Checker
- Gmail Email Signature - WiseStamp
- gMail Handler
- Gmail Manager
- Gmail Manager NG
- Gmail Notes Sidebar
- Gmail Notifier
- Gmail Random Sig
- Gmail RTL
- Gmail S/MIME
- Gmail Subject Popupper
- Gmail Toolbar Button
- Gmail™ Notifier (restartless)
- Gmail™ Notifier +
- GMarks
- GMiddle
- GMiF
- GMX MailCheck for Firefox
- GNOME Keyring integration
- GNU LibreJS
- GNU_Terry_Pratchett
- Go-Windows.de
- Go 2 CloudIs.Me
- Go2 proxy
- Goatbox for BTC-e
- Gobbledygook
- Go Beyond Toolbar
- Go classic [unmaintained]
- GoDaddy.com
- Go Daddy Email
- Go Daddy Hosting Control Center
- Go Daddy WHOIS
- Godinterest Share It Button
- GodSaves.tk Anti-Porn
- GodSaves.tk Linked
- Go Google
- GoJanusFF
- GoldenStar
- Goldey-Beacom Coll Theme with Personas Interactive
- Golf - Interactive Theme and Extension
- Golliver
- Goo.gl Information
- goo.gl lite
- goocal
- GoOctopus Job Search Toolbar
- Good Deeds
- goo Dictionary
- Good Old YouTube Downloader
- Goodratings
- GoodReflex - Football feeder
- GoodRelations Extension
- Good Website Inspector
- GoogAlexa
- Goog All Sites & Similar Sites Search
- GoogAzon - Product and Web Search, Combined
- GoogCal
- Googie
- Google +1 Button
- Google +1 Button Extension
- Google+ Bottom Right Icon Repositioning
- Google+ Manager
- Google+ New Tab
- google-pagerank
- Google - Persian Story of Send
- Google Advanced Operations Toolbar
- Google Analytics Monitor
- Google Analytics Watcher
- Google Apps Mail Watcher
- Google Art Project
- googlebar
- Googlebar Lite
- GoogleBlack
- Google Bookmarks Button
- Google Bookmarks IncSearch
- Google by Image Restartless
- Google Cache Tool
- Google Cal
- Google Calendar Notifier
- Google Calendar Quick Add
- Google Clutter
- Google Code Wiki Viewer
- Google Date
- Google Date Keeper
- Google DeTwitter
- Google Dictionary
- Google Disconnect
- Google Docs Viewer (PDF, DOCX, PPTX, XLSX, etc...)
- Google Document List View
- Google Documents Viewer
- Google Favicon 1998
- Google Favicon 2009
- Google Feature Search
- googleFU
- Google gadgets Sidebar
- Google german sites quicksearch (mark any word, right mouse click, go)
- GoogleHotKeys
- Google Icon
- Google Image Help
- Google Image Search
- google image search
- Google Instant Integration
- Google LEFT
- Google Link Preview
- Google Maps Button
- Google Maps Saved Locations
- Google Music Control
- Google Music Downloader +Hotkeys+Artist Bio+Player
- Google Music Hotkeys
- Google Music Keys
- Google Opener
- Google Ordered Lists
- Googlepedia
- Google Plus Notification Hider
- Google Plus Youtube Playlist
- Google Privacy
- Google Quick Search in 6 languages
- Google Reader Monitor
- GoogleReaderPlus
- Google Redesigned
- google redirect rewrite remover
- Google Redirects Fixer & Tracking Remover
- Google Results Walker
- Google Reverse Image Search
- Google Scholar Button
- Google Scholar Citations for Zotero
- Google Search 4 Wikipedia
- Google Search by Image
- Google Search Improver
- Google search link fix
- Google Semantics
- GoogleSharing
- Google Shopping List
- Google Shortener
- Google Sidebar Remover
- Google sign out
- Google Site Indexer
- GoogleSonomy
- Google Tasks Panel
- Google Tasks Sidebar
- Google Toolbar Button
- Google Translate, ImTranslator, Dictionary, TTS
- Google Translate It
- Google translate Persian / English
- Google Translator for Firefox
- Google Transliteration (Formerly Google Indic Transliteration)
- Google Trends Toolbar
- GoogleTube - YouTube Player
- Google Untracker
- Google Viewer
- Google Voice - Click-2-Call
- Google Web History On/Off
- Google™ Plus Notifier
- Google™ Translator (Add-on SDK)
- Google™ Translator Lite
- googly
- goo Green Label
- Googwiki
- gooreplacer
- Gophertool for Firefox
- GothicSingles Toolbar
- Go To Bing
- Go To Google
- Go to random tab
- GotoSelected
- Go to Top
- Go to WindizUpdate
- Gotta Have it!
- Gotta read it
- Go Up
- gPDF
- GPEX
- GPhotospace
- GPO For Firefox
- GPO support For Firefox and Thunderbird
- GProxy Tool
- GPSDetect
- gpum - Google mail Popup Unread Manager
- Grab and Drag
- Grabilla Screenshot
- Grablinx
- GrabMyBooks
- Grab page
- Grab Them All (screenshots of many pages)
- GradeGuru Citation Manager
- gradientoo
- Graffiti Creator
- Grafmails Addon
- Grammar Checker by Proofread Bot
- Grammarly for Firefox
- Gransubida.com.ar
- Graphical Timeline
- GraphicsEx
- Graphing Calculator Toolbar
- Gray Scale Toolbar Icons
- GRAZEit snippet - The best related-content discoverer!
- gReactions
- greased lightbox
- GreaseDonkey
- Greasefire
- Greasefire2
- Greasemonkey
- Greasemonkey Shared Script Folder
- Greasy Scripts
- GreatSummary
- Greeklish
- Greek textbox
- Greek Translator
- Green Gallery - Green Screen
- Green Power Indicator (GPI)
- Greenstone Search Bar
- Grepolis Toolbar
- Grepsr Screen Grab
- grey
- GreyBackgrounds
- greystash-addon
- GridFox
- Grid Proxy Manager
- Grin
- GR Navigation
- Grocery List Generator
- GrooveControl
- Grooveshark Desktopify
- Grooveshark Proxy
- Grooveshark Unlocker
- Groove Shredder
- GroovyNotes Instant Messenger
- Groowe Search Toolbar
- Groundspeed
- Groupon™ Button
- Group Sort Tabs
- Growl/GNTP
- Growl Download Notification
- Growl Notifications
- GSanitizer
- G Search
- GSearch
- GSMSPAIN Extension
- gt-button
- GTA-Series.com Official Menu
- gtafcode
- GTG Task Button
- GTGTL
- GTK Dark Theme
- gtranslate
- gTranslator
- gtzCode
- GuaGuaYun Screen-sharing extension
- Guanacast Alert
- Gudville
- Guerapa Desprotetor
- gui:config
- GuifiProxy
- GuitarPlayer.Ru Guide
- Gujarati fonts package
- Gujarati GK
- Gujarati Lexicon lookup
- gunup_addon
- GureGipuzkoa
- Guru3D.com QuickNavigate
- GUtil!
- Gutscheine-Live.de Vouchers
- Gutscheine und Rabatte
- GutscheinRausch.de
- GutscheinWurst.de
- GutscheinXXL.com
- GyazoFix
- GYBSearchBar
- H*R Toolbar
- h264ify
- Habbox Live Radio Player
- Habitica for Firefox
- HackBar
- Hacker's OpenSpace
- Hacker News++
- Hacker News Colors
- Hacker News Feed
- hacker news newer links
- Hacker News Reader
- Hacker News Utility
- Hackpad中文粗體修正
- HackSearch
- HackTheWeb
- Hadith
- Hadopeer
- Hahahator
- hakia ScoopBar
- HalaFlickr
- Halloween 2011 Interactive Theme
- Halloween Theme and Extension
- Halo Tribute New Tab
- Hamara Plugin Bhaiiii
- Handfire
- Handy Calculator
- Handy Dictionary
- Handy Maps
- HandyTab
- HandyTag
- Hangouts Last Seen Alert
- Happy, hippie Gruppentafel
- HappyChecker
- Hard blockers counter
- Harding University Theme with Personas Interactive
- Hard Refresh
- Harmony
- Harmony Mod
- HarnessNation+
- Harper College Theme with Personas Interactive
- hash0
- HashColouredTabs+
- hasher
- hashMem.com
- Hash Password Generator
- hashr
- HaTeMiLe for Browser
- HateML Pro Remote Debugging Extension
- HawkeyeKeith
- Haxball Room List
- hazzm
- HBXTracer
- HCL Meme
- Header Bar
- HeaderControl
- HeaderControlRevived
- Header Monitor
- Header Spy
- Header Tool
- HeadingsMap
- HeadlinesTicker
- Headup (Discontinued)
- Health Page App
- HeartbeatTM
- Heartbleed
- Heartbleed-Ext
- Heartbleed Monitor
- Heartbleed Notifier
- HearYoutube
- Hebrew Calendar
- Hebrew URL Fixer
- HEC URL Shortener
- HelloTrello
- Helper for GitHub notifications in Gmail
- helpplz uber
- Hemianopia Browser
- Henrietta
- Herdict Web
- Heroes
- Heuristic Network Prefetcher (beta)
- HexoSearch Toolbar
- HeyJoe
- Hi-tech@mail.ru news
- Hidden Menu Web Title
- Hide Add-on-Bar-Close-Button
- Hide all Images
- Hide BookmarksBar
- Hide Caption
- Hide Caption Titlebar Plus ⁴
- Hide Chrome
- Hide Clear List Button
- Hide Element
- Hide Facebook Live Ticker
- Hide Favicons
- Hide Fedora
- Hide Google Mail and YAHOO! Mail User Name: Improved Version
- Hide GUI bars
- HideImages
- Hide Img Tag
- Hide Likes on Facebook Notifications
- Hide Menubar
- Hide My Ass! IP Checker
- Hide My Ass! Web Proxy
- Hide Navbar
- Hide Navigation Bar
- Hide Option Pane
- Hide Orange AppMenu Button
- HideScrollbars [Fx 4-56]
- Hide Sync in Menu
- HideTab
- Hide Tabbar
- Hide Tab Bar
- Hide Tab Bar With One Tab
- Hide Twitter Guff
- Hide Unvisited
- Hide VK Emoji Smileys
- Hide Your Menubar
- highlight-compiler
- HighlightAll
- Highlight Elements (Selenium IDE)
- Highlighter
- Highlight Focus
- Highlightor
- Highlights
- Highlight Tab
- Highlight Textboxes Like Google Chrome (Orange)
- Highlight YouTube-integrated Comment
- High Point U Theme with Personas Interactive
- Highrise Subtile Enhancement
- Hikkup
- Hilarious Webcomic Manager
- HiliteOnSelection
- Hindi-English inline Translator
- Hindi GK
- Hindi Pop up
- Hindi WordNet (हिन्दी शब्दतंत्र)
- Hindi Youtube Video Download
- Histogram Viewer
- HistoryBlock
- History Button
- History disable button
- History in Threads
- History Janitor
- History Prefs Modifier
- History Rewrite
- History Search Sorted
- History Submenus
- History Submenus II
- HistProp
- Hit-a-Hint
- Hitbox Plus
- hitsniffer visitors monitoring
- HitWicket
- HivePoint
- HN Mobile
- HN Submit Helper
- Hockey TSNP Calculator
- HoFF- [Hide Offline Facebook Friends]
- Hole for www.ereality.ru
- Holmes CSS
- Holmsie
- Holy-kaba
- Holy-Madina
- HolyTransaction
- Home Button for firefox on android
- Home Double Click Extension
- Homeland Security Threat Level
- Homepage Randomizer
- Homestuck Troll Typing Quirks
- HommkHelper
- HONcode Toolbar
- Honestly.com SocialLink
- Hong Kong Weather Warnings
- hongxing Browse
- hooeey
- Hoopler
- Hootsuite Hootlet
- hooverZoom
- HostAdmin
- HostAdminPlus
- Host Images with Right-Click
- HostIP.info Geolocation Plugin
- Host Permissions
- Host Spy
- Hosts switcher
- Host Your Pictures
- Hotels Combined Search - Save on Cheap Hotel Deals
- HotKeyTabs
- Hot Virtual Keyboard Extension
- Hourly Chime
- House of Cards Tribute New Tab
- Hover Nofollow
- Hover Translate
- How'd I Get Here
- HowJsay Pronounce Selected Text Context Menu
- How Many Times Can I Back?
- HQ Youtube MP3 Downloader
- HRU Fx Addon
- HR Weather
- Hryunostat
- HT Helper
- HTitle (discontinued)
- HTML5 Chess Game
- HTML5 Outliner
- HTML 5 Validator
- HTML5 Video Everywhere!
- HTML5 WebSQL for Firefox
- HTML5 YouTube Everywhere
- HTML5toggle
- HTML Color Coder
- HTML Desktop Notifications
- HTML Regex Data Extractor
- HTML Ruby
- Html Validator
- HTML Validator (based on CSE HTML Validator)
- HTTcryPt
- HTTP/2 Indicator
- HTTPAuth
- HTTP Content Security Policy Detector
- HttpFox
- HTTP Header
- HTTP Header Mangler
- HTTP Logout
- httpOnly
- HttpRequester
- HTTP Request Logger
- HTTP Resource Test
- HTTP Response Browser
- httProxy
- HTTPS by default
- HTTPS Content Signatures Checker
- HTTPS Everywhere
- HTTPS Facebook
- Https Instead
- Https Only
- HTTPtoHTTPS
- HTTP Tool
- Hubgets Screen Share
- HubTalk
- Huffduffer
- HugBack for Facebook
- HUGit
- Hulu button
- Humans.txt
- humanstxt
- Humboldt State U Theme with Personas Interactive
- Hupper
- hwmForums
- HWZone Forums assistant
- hxxp
- hyebdv
- hyipid Toolbar
- hypem controller
- HYPER-ANCHOR
- HyperBK
- Hyperlink5 Cloud Bookmarks
- HyperTranslate
- i-cite - a bibliographic tool for life scientists
- i-Pusher
- I.UA Mail Checker
- i2Clipart - Royalty Free Cliparts
- i2Type
- IANT Desktop Sharing
- IBC Photo Filter
- IBC Userfilter
- iBistro OPAC :: Easy Record View
- Ibrii Sidebar Extension
- iCal for Firefox
- IcanProve
- Ice Fishing Menu
- Iceweasel Branding
- iCheckNetflixPlus
- ichinen search for Firefox
- Ich unterstütze Webtermine
- iClip
- Icon Effects
- Iconic Firefox Menu
- iConverter
- ICTABB_FIREFOX
- IdentFavIcon
- IdenticaBar
- Identify
- Idiri
- iDislike
- iDislike Button For Facebook
- IDND
- idnes-nicky
- IDN Navbar
- Idokep menu
- I don't care about cookies
- I Don't Want to Miss a Notification!!1
- ID Secured Toolbar
- idwsautolink
- IE8 Activities (Accelerators) for Firefox
- IE Like HTTP-Authentication
- IE NetRenderer button
- IE Tab
- IE Tab + (FF 8+, 7, 6, 5, 4, 3.6, 3.5, SeaMonkey)
- IE Tab V2 (Enhanced IE Tab)
- IE View
- IE View Lite
- iFamebook (Facebook Profile Visitors)
- iForum
- IGN++
- ignmenu
- iGo.ge
- iGoogle Sidebar
- iGoogle Tab Remover
- IHK Failr
- iHttpHeader
- IIIT LAN Browser
- iimmgg.com Tools
- iinview-qa
- IKIprev
- iKute Emoticons for Facebook Chat
- ILDRING
- Illuminations for Developers for Firebug
- i Love.fr
- Il Volo Theme with Personas Interactive
- im9 Rehost
- iMacros for Firefox
- Image-Show-Hide
- Image2Icon - Resize Image and/or Get Data URI
- Image and Flash Blocker
- Image Assistant
- Image Block
- Image bookmarking
- ImageBot
- Image Download
- image fetcher
- Image Forward
- Image Gaze
- Image GOku Image Viewer
- ImageGrabber
- ImageHost Grabber
- ImageHosting - Interes
- Image Index
- Image in New Tab
- Image Lookup
- Image Map Editor
- Image Mikirenaizer
- ImageOak image adder
- Imageperl Firefox addon
- Image Picker
- ImagePile right-click
- Image Popout
- Image Preview
- ImagePreviewer
- imageResizer
- Image Resizer
- ImagesBasket Uploader
- ImageSearch
- Image Search for Client
- Image Search Options
- ImageShack Fix 0.2
- ImageShack right-click
- Image Source Copier
- Image Spark
- Image Spider
- Image Switcher
- Image to MathML
- Image Toolbar
- Image Tools
- Image Transloader
- ImageTweak: zoom/rotate images and videos!
- Image uploader for pic.lg.ua service
- ImageUp right click upload
- ImageZilla.net Image Uploader
- Image Zoom
- Imagiris
- Imagus
- IMDb & Rotten Tomatoes for Prime Instant Video
- IMDb + Clipland
- IMDB Filter Helper
- imdb on netflix
- IMDb Plus
- IMDb Preview
- IMDb rating
- IMDB Ripper
- IMDB RT Downloader
- IME and DiMENSiON
- IME Area
- imediacentral.com - Online Radio Toolbar
- IMEStatus
- img2tab
- ImgAvenue.com Image Uploader
- IMGCafe.com Image Uploader
- Imgchili.com Upload
- ImgClub.org Image Uploader
- IMGCrave Firefox Uploader
- ImgDino.com Upload
- ImgFlex Remote Upload
- Imgflip Quick Submission
- ImgFly.eu Free Image Hosting
- IMGfreak right-click
- ImgLikeOpera
- IMGoogle - Google Reverse Image Search
- ImgPageDown
- Imgs.re Image Uploader
- ImgSpot.Org Quick Image Uploader!
- IMGStore Image Uploader
- Imgur .gifv
- Imgur Cyber Giraffe
- Imgur to Filmot
- ImgViewerPlus
- Imitate IE
- imkbizle
- imoin-jetpack-deprecated
- Impero Education Pro
- IMpics - Send Picture Links in Chats or Email
- IMVU Toolbar
- iMyne Toolbar
- in-subreddit-search-firefox
- in10search (Google RESULTS in context menu)
- Inactive tab
- Inbox Toolbar
- Income Tax Calculator India
- IndexedDB Browser[Updated FIX]
- India Chat Forum Menu
- India Everyday
- Indian-Newspapers
- Indiana U of Pennsylvania w/ Personas Interactive
- Indian Stock Market
- IndiaShopps
- India Stock Market and Sensex Watcher
- India Times Theme with Personas Interactive
- Indiblogger.in menu
- Indic IME
- Indic Input Extension
- inDomainBookmarks
- Indonesia-newspapers
- inEntertainment Plugin
- Infocon Monitor
- Infocon Watcher
- InfoLister
- InfoNotary Configurator for Mozilla
- Infopages toolbar
- Informational Tab
- InFormEnter+
- infoRSS
- Infranix Visio
- IngvarFox
- InheritPrincipal
- Initiative Tracker Helper
- Inline Audio Player
- Inline blocked image view
- Inline Code Finder
- Inline Code Finder for Firebug
- InlineDisposition
- Inline Google Definitions
- Inline Translator
- InOut Navigation Menu
- Input autofocus
- Input Changer
- Input Language Assistant
- Inquiry Bar
- InSearch
- Insite Search
- Insomnia Forum Menu
- Inspect Context
- InspectorWidget
- InspectThis
- INSTA BAY
- Instablogs Submitter
- InstaClick
- Instagloss
- InstagramSpot
- Instagram Video Download
- InstaImg right-click
- Install Button
- Install Collection
- Install Extension
- Instant Computer Help from Sunflower Network
- InstantFirefox
- InstantFox Quick Search
- Instant Smart Quotes
- InstantTweets
- Instant Urdu Dictionary
- Instaright - social bookmarks (Instapaper)
- Instasaver
- Instawell
- Instructables
- Integrated Authentication for Firefox
- Integrated Inbox for Gmail and Google Apps
- Interaction Center Click-To-Dial
- Interactive Music Theme
- Interactive Weather Theme
- Intercept YouTube Links
- Interclue
- InterfaceLIFT Downloader
- InterfaceLIFT NewTab
- International Sideboard
- Internet Crime Reporter
- Internet Explorer Shortcuts
- Internet Illuminator
- Internote
- InterSpy.Net WebSite Information
- InTheFuture
- In The News
- intoDNS
- InTranslate
- Inveni - Movie and TV Recommendations.
- InverteLink
- Investeerimiskonto 2011
- Investment Calculator
- InvisibleHand
- IO.Translator
- Iobloggo statusbar
- IP2Location IP Geolocation Plugin
- IP Address and Domain Information
- IP Address Lookup
- IP Cam PTZ
- IP Check
- IP detection / resolver
- IPFingerPrints.com IP Location Information
- ipFlood
- IPFS Companion
- IPFW Theme with Personas Interactive
- iPhone AppStore
- iphonesender
- IPIM
- IPISFF
- IPLogger
- ipmonkey
- IP Notebook
- ip Plus NewTab
- IpProtocols
- IPRental Proxy Network
- iProctoring
- IPvFox
- iQube Scheduler
- iquote.me
- Iran-newspapers
- IranianCalendar
- IR Broker
- irclnx.com extension
- Irctc Pnr Status
- iReader
- Ireland-newspapers
- IrisFox
- Iron Realms Toolbar
- iRotate
- IrregularVerbs
- IRUnfilter
- Irvine ContextMenu
- is.gd Creator
- is.gd Creator (fork)
- IsAdmin
- Isha Updates
- Is It Compatible?
- iSkor
- Islamic Date
- ISOC Policy Audit Plugin
- Israel-Newspapers
- iS Toolbar
- iswitchb-tabs
- It's All Text!
- It's Video Games
- Italy-newspapers
- Itasa Notifier
- iTGrunts
- ITPNews.com
- iTrustPage
- ItsYourTurn-Notifier
- IUD Sql
- IusOnDemand toolbar on italian laws
- ivlogsafe
- iVocalize Screencasting
- Ivy Video Converter Extension
- iWeb2x - Printer Friendly Web
- iWEBTOOL Webmaster's Toolbar
- IWUNursingDatabases
- iXBT Gallery thumbnails maker
- IYH Launcher
- iyte.net menusu
- J-WAVE Toolbar
- Ja.gs for Firefox
- JabFox
- Jacksonville State U Theme w/ Personas Interactive
- JaffaSites
- Jaikungfu
- JAJAH Click-to-call
- Jakilid
- Jalopnik NewTab
- Jamendo Album Downloader
- Janus
- Japan-newspapers
- japanizer
- Javascript Command
- JavaScript Debugger
- Javascript Deminifier
- JavaScript Deobfuscator
- Javascript Injector for Firefox
- JavaScript Object Examiner
- JavaScript Terminal
- JAWS HTML 5 Fixes
- jci events
- jdCaptcha
- JeemPlus
- Jelly Bean Theme Wallpaper Tab
- jenkins-status-monitor
- Jenkins Build Monitor
- Jesse Screen Capturing
- JetBlue ShopTrue Notify
- Jet Donkey Social Bookmark
- Jeteye
- Jetpack Bugzilla Organizer
- JFMenu
- Jideshabsc
- Jidesha for Ideolys
- Jidesha on kommander.ath.cx
- Jiffy
- Jigsaw Puzzle Maker
- JIIT Proxy Switcher
- JIRA Issue Opener
- JIRA Status Colors
- JIT Inspector
- JLP Kit
- Jmp2.net Toolbar
- JMundo
- JobClipper
- Job Manager
- Jobs77 Job Search
- Job Search
- Jobspeaker
- jobsRmine
- Jocly
- Joe's Proxy Tool
- JohnDone
- johnnycache
- Joindota livestreamer companion
- JO Link Target Finder
- Jolome News
- Joomla! Admin
- Jordy Video Downloader
- Joshua Tree Extension
- Jot
- JournalUoA
- Journaux Quotidiens Algeriens
- JoyBidder eBay Auction Sniper Free Edition
- jQuery
- JsBloat
- JS Deminifier
- jsdoc
- JS Exec
- jsfiddle
- JSLinter
- Jsmile
- JSOff
- JSON-DataView
- JSON-RPC
- JSONovich
- JSONRequest
- JSONView
- jspanel
- JS Print Setup
- JSW:O Alert
- Juice
- JuiceNote Plugin
- Juicy Studio Accessibility Toolbar
- Julianne Hough Official Toolbar and Theme
- jump-to-anchor
- Jump to tab number
- Jungletrain.net Toolbar
- Jupiter Broadcasting Affiliate Redirect
- Jureeka! Powered by LII.
- Just another google image search addon
- JustBlogIt
- Just Disable Stuff
- Just Go
- Just Restart!
- JustSmile
- jV
- KaamosCreations DesktopStreamer
- Kaboodle
- kabotya
- Kahuna - Movie Trailers In Netflix
- Kai3 Toolbar
- kalyanbhunia (3)
- Kamus
- Kanbanmarks
- Kannada fonts package
- Kapi-Ducky
- KarClient
- Karma Blocker
- Karmacracy
- Karma Readout
- KasKusMenu
- KasKusMenu - Maintained by blogerch
- Kaskus Quick Reply+
- katakombe.com KEI Calculator
- Kateb_504-1.0-fx
- Katy Perry by MaDonna - Interactive Theme
- Kauflux.de Quick Search
- KBBI Daring
- kbTrainer FF
- KDE Wallet password integration
- Kee
- Keekto
- Keenko
- KeePass Helper
- Keepbag Bookmarks
- Keeper® Password Manager & Digital Vault
- Keeppy
- Keep Until Closed
- Kelly Clarkson Theme with Personas Interactive
- Kenny Chesney's No Shoes Radio Add-on for Firefox
- ketkp.in
- Keurig K-Cup Deals
- Keybinder
- Keyboard Shortcut
- Keyboard Shortcuts
- Keychain Services Integration
- Key config
- Keyfixer
- Key Manager
- keyMazony
- Keynotes - Made Easy
- keyople Screen Sharing
- keySharky
- Keyword Bookmarks
- Keyword Box
- Keyword Recommendation
- KeywordSelection
- Keyword to Latest Digg URL Converter
- KGen
- KHANDBAHALE Dictionary Translation
- Khuilo-Ficator
- KickAssTorrent Search
- KickassTorrents Toolbar
- Kicktraq
- KIDO'Z TV
- KidZui
- KidZui K2
- kiki-mg
- Kill Button
- Kill FB Feed
- Kill Infinite Scroll
- Kill It
- Kill News Feed for Firefox
- Kill Panel Animations
- Kill Quit
- KillSpinners
- KiminBu?
- Kim Kardashian by MaDonna - Interactive Theme
- Kimmie
- KingBonus.de Addon
- kings2central
- Kino.to ad hide
- Kinopoisk
- kioskfox
- KitaDic
- kitappara
- KitapSever
- Kitco Spot Gold Price Watcher
- Kitsune
- Kitten Block
- KittyKeys
- Kiva.org UI Improvements
- Kiwi Amazon Price Comparison
- Klick-Mart
- KlickIt test
- Klout
- KMinesweeper
- Kngine Toolbar
- KnowMore Extension
- KOCT
- Kodak EasyShare Gallery Companion
- Koi Pixiv Addon
- KOLOBOK Smiles for Firefox
- KoL Toolbar
- Kongregate Sidebar
- Konquefox
- Koopmetjehart
- Kotaku Fix: Fox Edition
- KousokuFX
- KPD200 Live Screen Capturing
- Krayon
- Kristian Warnholz.de.to-Lesezeichen
- KRUX Inspector
- ksbtechies
- Kuai-Translator
- Kudos
- Kudos Coins
- Kuibu
- Kukkuniiaat
- Kurdistan Toolbar (ostan-kd.ir)
- kweeper
- KWICK! URL Shortener
- KwikSearch
- Kyrgyz Key
- kyudenmeter4fx
- L-Square Responsive Design Inspector
- L2N Secure
- L2P StatusBar
- Labmeeting
- Lang-8 NG filter
- LanguageBob
- Language Button
- Language Help
- Language Manager
- Language Pack Install Helper
- Lapi Stream
- Larger Livemarks
- LargeThai
- Large Thai Script
- Larry Filter for Twitter
- La Salle U Theme with Personas Interactive
- last.fmCode
- LastAM
- LastFM.Censor
- Last Metal Archives
- LastModified Date
- LastPage
- LastPass Password Manager
- Last Selected Tab
- LastTab
- Last Tab Close Button
- Laterbox
- Latest BBC News
- Latest Forex Bonus
- LaunchPad
- Launchpad Helper
- Launchy
- Lauren Alaina Theme with Personas Interactive
- Lavabit Sign In (1)
- Layar tancap
- Layout Plan (Menu on Titlebar)
- Lazarus: Form Recovery
- LBC Firefox
- LBC Shipping Cart
- lcwmcfpon
- LDS Mingle Toolbar
- LDS Toolbar Extension
- LDV Generator
- League of Legends Events
- League of Legends Match History Fix
- Leak Monitor
- Learn Spanish
- LeechBlock
- Leengoo
- Leet Key
- leftsidedBookMarkStar
- LeftSideStar
- LEF View
- Legacy link context menu
- Legacy Test Pilot (Outdated)
- Legaler Screen Sharing
- Legible
- LEGO Batman Tribute New Tab
- Lendable for Amazon Kindle
- Lenddo Session Manager
- LEO Dictionaries
- LepraPanel 2
- Leprosorium Karma Attitude
- lernu-es
- lernu-fr
- LesserChrome
- Less Spam, please
- LetGo
- LetMeSearchItForYou.com
- Lets Yell
- Lexis Views
- Lexmark Toolbar
- lget
- lgtm-for-firefox
- LGWORKS toolbar
- LibertyGuard
- Library Detector
- Library Exporter
- Libup - Beautiful and practical start page
- Licorize
- Liferay Dev Assistant
- Light Dict
- Lighterweight Themes for Australis
- LightFish - Best of the web on your iPhone
- Lightshot (screenshot tool)
- LightSMS
- Light Switch
- Like.fm Social Music Tracker
- Likeastore - Social bookmarking for geeks
- LikeBuster for Firefox
- Like I Give A Fuck
- LikeJournal - Social Bookmarks for the Like Button
- LikeThePage - Facebook Like Any Page!
- Likz.Me - Photo Sharing
- Lilo
- LimePic
- Limestone College Theme with Personas Interactive
- Lindenwood U Theme with Personas Interactive
- Lineage2 Server Status
- Line Marker
- Lines
- Lingerie Football League - Official Theme
- Lingtoolbar
- LinguaLeo
- Lingvo OnLine!
- Link-It
- link2email
- Link Alert
- Linkator - because everything is a link!
- LinkBasket
- Link Checker
- LinkChecker
- Link Copier
- LinkedTop Helper
- Link Evaluator
- LinkExtend - Safety, KidSafe, Site Tools
- Link extractor
- Link Fixer Thing
- Link Gopher
- Linkhay For Firefox
- Link HighLighter (LHL)
- LinkHop
- Linkification
- Linkificator
- Linkify (for Microsoft Lync)
- Linkinator
- Linkmug
- linkNab
- Link Ninja
- Link Pad
- Link Pager
- LinkParser
- Link Password
- LinkProtect Helper - Protect Links, Hide Urls
- LinkPush
- Link Queue & Preview Sidebar
- LinkRedirector
- Links and Forms
- Links for friends
- Link Sgf Viewer
- LinkSidebar
- Links Like This
- LinkSozluk
- Link Stalker
- Link Status
- Link Status Redux
- Link Stunner
- linktie
- Link Toggler
- LinkToShareExtension
- Link Virus Check - Security Plus
- Link Visitor
- LinkVisitor 2
- LinkWalker
- Link Widgets
- Linky
- LinkyMobile
- LinkyWink
- LinrLightWeb
- LintBrushJS
- LinusTechTips Notifier
- Lipikaar - Easy typing for all Indian languages and Arabic
- Liquid Tabs
- Liquid Words
- list-it: take notes quickly! (listit, list.it)
- List Addons in Windows' Programs
- Listar
- listat
- ListenOnRepeat Youtube Video Repeater
- Listen to the Holy Quran
- List Open URLs
- Lited EasyPublish
- LiteRider7
- Litranslate
- LiveClick
- LiveClientFF
- LiveDic
- Live E*Trade
- Live Edit
- liveForum
- Live Gold (Deprecated)
- LIVE HTTP Header
- Live HTTP Headers
- Live IP Address
- LiveJournal Addons
- Livejournal Comments Expander
- LiveJournal Community Moderation
- Livejournal Friends Checker
- LiveJournal Quote
- Live Mailer
- Live PageRank
- Livepageranks Extension
- Live Quran Radio
- LiveReload
- Live Stream Notifier
- LiveTopHatenar
- Livewatch.de Extension
- Live Writerfox
- LiViNo Reader
- Lišta Centrum.cz
- lmnpop
- Load2Mobile
- LoadAndDie
- Loading Bar
- Load Tabs Progressively
- LOB Menu
- localbitcoins price monitor
- Locale2MUI
- Locale Switcher
- Local Filesystem Links
- LocalLink
- Local Load
- Local Music Player
- LocaProxy Toolbar
- Locate Address in Israel
- Locate in Bookmark Folders
- Location Bar Characters
- Location Bar Enhancer
- Locationbar Limit
- Locationbar²
- Locationbar³
- Location Guard
- LocationMorph
- Location Navigator
- Locator - locate on google map
- LOC EAD Beautifier
- Lockerz Login
- Lockr
- Lock The Text
- Locust for Khanwars
- log2stas LiveJournal Add-on
- Log Helper
- LoginLane Toolbar
- LoginManager
- LogMote addon
- Logos Toolbar
- Log Search Bar (Selenium IDE)
- Loki
- Lola
- lolifox-ErrorZilla
- lolifox - Fierr MOD
- Lomadizador de links - Lomadee
- Longdesc
- Longdo Dict Menu
- Long Titles
- LongURL Mobile Expander
- Long URL Please
- Long URL Please Mod
- Longwood U Theme with Personas Interactive
- Lonua MakeFaster
- Looking For Group LFG Comic Interactive Theme
- Looking Glass
- Lookpick Search Box
- Look up a word
- Lookup Definitions Online
- Look Up in Dictionary
- LookupVijadic
- LookUp [Word Reference]
- LookWAYup Sidebar
- LORE
- LoremIpsum Content Generator
- LoremTools
- lori (Life-of-request info)
- LOR Notifier
- Lotindan Kirillga
- Loudtronix Helper Extension
- Low-price games helper
- LowBrowse
- Low Quality Flash
- lp: URI scheme handler
- LQ Score
- Lu.ly - Facebook and Twitter Toolbar
- LuckyBar
- Lucky Flix
- Lucy
- Luffi
- Luke Cage Tribute New Tab
- LulzImg Image Uploader
- Luminate Online Page Editor
- Lunapic Image Edit
- Lunatic Fox
- Lynki Conversations - Share and Tweet your Comments
- Lynx - Add-on for Firefox
- LyricalAssault.co.uk Toolbar
- lyrics
- LyZ
- M&M's New Tab
- M-Links
- m-wiki
- M3Uripiton
- M3U Ripper
- M5zn Dir
- MAB
- Macro data
- Mac Shortcuts
- MAFIAAFIRE: Gee! No evil!
- MAFIAAFire: Parasites and Monkey Lights!
- MAFIAAFire: ThePirateBay Dancing!
- MAFIAAFire Redirector
- magento-form-filler
- Magic's Video - Downloader
- Magic: the Gathering Toolbar
- magicConverter
- Magic Open Download Folder Button
- Magic Traders Private Messaging
- Magicword by Vajehyab.com
- Magnet Fixer For Anonymouse
- Magnetic
- Magnetic Money Desktop
- Magnetic Money Int Desktop
- Magnetiser
- Magnetlink Shortener
- Magneto Calendar Extension
- Magnetz
- Magnifier
- Magnifier-Zoom
- magnolia
- Magrent
- Mail.BG Mail Checker/Notifier
- Mail.com New Tab (1)
- Mail.entrum.cz
- mail.gov.in-Ad-Hider
- Mail and Save Tab URLs
- MailCatch: Temporary Emails
- Mailforgood
- Mailfrom
- Mail Notifier
- MailNull Now!
- MailtoWebmails
- majawap
- Majorcommand.com Game Turn Notifier
- Major League Gaming MLG Interactive Theme
- Majstro Translate
- Make Address Bar Font Size Bigger
- Make Bookmark
- Make Link
- MALA Hindi Spell Checker by MCRPV, (Anurag Seetha)
- Malayalam fonts package
- Malayalam News
- Malaysia-newspapers
- Mallutorrents Toolbar for Firefox
- Malone University Theme with Personas Interactive
- Malware Search
- Mammal Puzzles
- Manage Folders
- MandaloATraer.com
- Mandarin Popup
- Mangada
- Mangaka
- Manhattanville College with Personas Interactive
- Mansfield University Athletics Interactive Theme
- Many Short Url Maker
- Map+
- Map This
- Map With Google
- Map with Google Maps
- Marathi fonts package
- Marathi Spell Checker
- Marathi WordNet ( मराठी शाब्दबंध )
- March Madness New Tab
- MarkDown Editor
- Markdown for MeFi
- Markdown Here
- market2member
- MarketWatch Discovery Bar
- markNewestVersion
- Mar Mod Updated
- Marquess
- Marro.ws Highlighter Addon
- Marshall U Alumni Theme with Personas Interactive
- Masking Agent
- MaskMe: Online Privacy Protection
- Mason
- Mass Effect: Andromeda New Tab
- Mass Forget
- Mass Password Reset
- Master Password+
- masterpassword for Firefox
- Master Password Timeout
- Master Password Timeout (Updated)
- Matchbook
- MatchBox
- MatchI
- Match the News
- MathEval
- MathML-fonts
- MathML Copy
- MathML Font Settings
- MathML Zoom
- maventra
- Maverick Toolbar
- MAXify 2016
- Max Tabs
- Max Tab Toggle
- maxxed_addon
- MBTA+
- M Button Pack
- McAfee Secure URL Shortener
- McAfee Security Scan Plus detection
- mc chris Website Menu Navigation
- MClickFocusTab
- McMaster U Theme with Personas Interactive
- McNeese St U Theme with Personas Interactive
- Mcounts Rewards
- MD5 Reborned Hasher
- MDN: Save With Comment Hotkey
- MDN Interface Documentation Generator
- MDWS Process Server Toolbar
- MeasureIt
- Measurer
- Media Converter
- Media Converter and Muxer
- Media Keys
- Media Key Support
- MediaPimp - Internet Radio, Save Videos, and more
- MediaPin Pinning add-ons
- MediaPlayerConnectivity
- Media Player for YouTube™
- MediaPlus
- Media Sniffer
- Media Stealer
- Media Stealer mod
- MediaWrap
- MedicalWebCampus Screen Share
- MedWOW.com - Medical Equipment Search Bar
- Meeco Launcher
- MeeTimer
- Meet The Smilies
- MeetUp italian translation
- Mega-Debrid plugin
- megadivx
- Megafun toolbar
- MegaGet ParallelStreamer
- MegaLab.it Menu
- MegaUpload DownloadHelper
- Megaupload SX.3.2
- Me gusta Mall
- Meldium
- MeloSIP Click2Call
- meLoTiro
- melssCRM Quick Lead
- Members Interests
- MemChaser
- MementoFox
- Meme Repo Helper
- MemeReview Twitter and Web Search Trends Toolbar
- MemoForums
- Memonic for Salesforce Web Clipper
- Memonic Web Clipper
- Memory Fox Next
- Memory Menu
- Memory Meter
- Memory Profiler
- Memory Restart
- Memrise Media Blocker
- MendeleFox
- Meneamé Asocial
- MentorMob
- menubar autohide fixed
- MenubarFlex
- Menu Button Reskin
- MenuDKZ
- Menu Editor II
- Menu Icons Plus
- Menu Mod
- Menus de ElOtroLado
- Menu Wizard
- MEO Cloud
- MercadoLibre Argentina Buscador
- MercadoLibre Colombia Buscador
- MercadoLibre Costa Rica Buscador
- MercadoLibre Ecuador Buscador
- MercadoLibre Mexico Buscador
- MercadoLibre Peru Buscador
- MercadoLibre Uruguay Buscador
- MercadoLibre Venezuela Buscador
- Merdeka.com
- MereCat Chat
- Mernik Monitor Dev Version
- Mervin Praison
- Meseek Search Widget
- Message Seen Disable for Facebook™
- Messenger for Google™ Hangouts
- Meta Assassins Assassination Plugin
- Metacomments
- Metafetch
- Metal Lion Addressbar Improvements
- Metal Watcher
- MetaPlode's Toolbar
- MetaProducts Integration
- MetaTags
- Metawishlist Toolbar
- Meteo Debrideurs
- Methuselah
- metjm.net
- metrika-info
- MetroBuddy
- Metroid Ultimate Sidebar
- Metro State U Denver with Personas Interactive
- Mevoked Toolbar
- mgresult2011-15
- mHelper
- Mibbit Browser extension for Firefox
- MiboriFirefox
- microGesture
- microGesture Tab Edition
- Microstock Royalty Free Image Search Toolbar (picNiche)
- Microsummary Generator Builder
- Microsummary Manager
- Microvellum Communications
- mid
- Midday Commander
- Middle Click Tabbar
- Middle Click To Go Back
- Middle Mouse Preferences
- Middle Search
- Midwich Search
- MikeLike
- Miles Per Dollar Calculator
- MileWideBack
- Millersville U Theme with Personas Interactive
- Millikin U Theme with Personas Interactive
- MimicMe
- Mimulus
- MindiT
- Mindomo Bookmarks
- Mind the Time
- Mines
- Minggl
- MinichanNotifier
- Minimalist Bookmarks Toolbar
- Minimalist UI
- Minimeter
- Minimize Addon-Bar
- Minimize On Start and Close
- MinimizeToTray
- MinimizeToTray For FF 3.5
- MinimizeToTray revived
- Minimode
- minitube-integration
- Minkaku
- Minot State U Theme with Personas Interactive
- MinskTemp
- Mint Running Totals
- MinUI
- Minus
- MinuteBox Availability Extension
- Minute Minder for Cingular Service
- MioBot - Price Tracking and Sales Alerts
- miPanga Toolbar
- MiroIt
- Mirror2Play
- MirrorMaker
- MirrorNinja
- Misfavoritos Toolbar
- Missing e
- Missing Link Context Menus
- Mississippi College with Personas Interactive
- Missouri Western St U with Personas Interactive
- Mistakopedia
- Mister Wong Toolbar
- MIT Discussion Enhancement Suite
- Mitto Password Manager
- Mixcloud Button
- mixi Quo
- MKB Read Now!
- mKiosk: Kiosk Mode for Firefox
- MK Notifier for model-kartei
- MKP- Selenium IDE tools
- MldonkeyFox protocols Handler
- MLdonkey Protocol Handler
- ML Progress Bar
- MLS Chicago Fire Soccer Interactive Theme
- MLS Chivas USA Soccer Interactive Theme
- MLS Colorado Rapids Soccer Interactive Theme
- MLS Columbus Crew Soccer Interactive Theme
- MLS D.C. United Soccer Interactive Theme
- MLS Houston Dynamo Soccer Interactive Theme
- MLS L.A. Galaxy Soccer Interactive Theme
- MLS New England Revolution Soccer Theme
- MLS New York Red Bulls Soccer Interactive Theme
- MLS Real Salt Lake Soccer Interactive Theme
- MLS San Jose Earthquakes Soccer Interactive Theme
- MLS Seattle Sounders Soccer Interactive Theme
- MLS Sporting Kansas City Soccer Interactive Theme
- mluschipranie
- MM3 Proxy Switch
- MMD WordPress.com Extension
- MMHK Round Table
- Mnenhy
- MobaCut
- Mobile.de - Show Seller Location
- Mobile Barcoder
- Mobile toolkit
- Mobilize Web
- MoCo Authorizer
- modcybersearch
- Modern Download Manager
- Modernizador de la AFIP
- ModestTab
- Modify Headers
- Modify Response
- Modify Response Headers
- Mods.de Bookmark Watcher 2
- Moja NK
- Mojave Bookmarks for Firefox
- Moji
- Molybdenum
- Moment
- Monalo Toolbar
- Mongolian ASCII to Unicode Converter
- Monifox
- MonkeyContact
- Monkeysphere
- Monmouth Telecom Click-To-Dial
- Monster Blog Sack
- Monster Jobs
- MonstersGame: Vampires vs Werewolves Menu
- Moonlyt Screenshare Companion
- More About
- More Compact GMail
- More In Content UI
- More or Less Browser Window Padding
- More Search Engines in Context Menu
- Morning Bookmarks
- Morning Coffee
- Morse
- moShare
- Most Recent Tab
- Motherboards.org Forums Navigator
- Motivate Clock | Time Tracker
- MotoSwap
- mOTP
- Mountains HD New Tab Theme
- MouseControl
- Mouse Gestures Suite
- MouseHunt HornTracker for Firefox
- Mouseless Browsing
- Mouseover Bookmarks Toolbar
- Mouser Part Search
- MouseZoom
- MovableReload29
- Move Tabs
- Move Toolbar
- Movie Flix "Own It!"
- MovieSearch
- Moviesearcher
- Moxilnet
- moz://a protocol handler
- MozAmPeek Streamer
- MozButton
- MozCamp NewTab
- MozCC
- MozFBRH
- Mozilla Archive Format, with MHT and Faithful Save
- Mozilla Balkans info widget.
- Mozilla Italia
- Mozilla Labs - Jetpack Prototype
- Mozilla Labs - Prism
- Mozilla Labs - Snowl
- Mozilla Labs: Prospector - about:profile
- Mozilla Labs: Prospector - about:trackers
- Mozilla Labs: Prospector - AwesomeBar HD
- Mozilla Labs: Prospector - Find Suggest
- Mozilla Labs: Prospector - Home Dash
- Mozilla Labs: Prospector - Instant Preview
- Mozilla Labs: Prospector - OneLiner
- Mozilla Labs: Prospector - Predictive Newtab
- Mozilla Labs: Prospector - Query Stats
- Mozilla Labs: Prospector - Recall Monkey
- Mozilla Labs: Prospector - Search Tabs
- Mozilla Labs: Prospector - Site Suggest
- Mozilla Labs: Prospector - Snaporama
- Mozilla Labs: Prospector - Speak Words
- Mozilla Labs: Prospector - Tab Focus
- Mozilla Labs: Rainbow
- Mozilla Reps Companion
- Mozilla Tree Status
- Mozilla XForms
- MozillaZine Tabindex Fixer
- mozImage
- MozLab
- mozless
- MozMenu
- MozRepl
- Mozteroids
- MozTweak - Addons.Mozilla.Org Enhancer
- MP3 Converter
- mp3extract
- mPage
- MR2 on Air!
- MR Tech - Gant Icon Pack
- MR Tech About:About
- MR Tech Disable XPI Install Delay
- MR Tech Link Wrapper
- MR Tech Link Wrapper Lite
- MR Tech Toolkit
- mSession Keeper
- MSN News
- MSN URL
- MSTS-Dictionary
- MSU Moorhead Theme with Personas Interactive
- MTG Finder
- muautolink
- MuddleMe
- Muddleme Lite Extension
- Mudim
- Muditanist
- Mukparasi
- Mukparasi Korean-English Dictionary File
- Multi-access Encryption by Vinay Rao
- Multi24h - dev
- Multi Bookmark Toolbars
- MultiColumn
- MultiCopy
- Multi Dictionary Lookup
- MuLTiFlow
- Multifox Toolbar Button
- Multilinkus
- Multimap Toolbar Button
- Multimedia Dictionary
- Multi Open
- Multi Open Plus
- Multiple Addon Deactivator
- Multiple File Downloader
- Multiple Search Suggestions
- Multiple Tab Handler
- Multiply Toolbar
- Multirow Bookmarks Toolbar
- Multirow Bookmarks Toolbar Plus
- Multisearch
- MultiShare
- MultiSidebar
- Multi Smart Search
- Multi Social Share
- MultiSocialSidebar
- Multi Web Search
- Murdoch Alert
- Murdoch Block
- MurdochBlock.info's-FireRupert-Android
- musicbasket
- Music Buddy
- Music detector
- Music Dumper
- musiconbrowser
- Music Player Minion
- Music Store Wizz
- Music World Anonymous Quick Button
- Muskie Menu
- mussumipsum
- MuStat - Website Analysis Tool
- Musulman Toolbar
- Mute Music During Youtube Video
- Muter
- MX + GHC Toolbar
- mxr-vim
- MxToolbox BAR
- my-addon-test
- My-Musix for Firefox
- my-spambox
- MyAdFilter
- MyAirline Trick
- Myanmar Converter
- MyAthens Toolbar
- My Bookmarks
- MyBookmarks
- MyBrowserPage - Your Browser's Homepage
- myCircle.tv
- My CodeIgniter
- My Computer Hates Me!
- MyContents
- My CopyFixer
- MyCoupons Add-on
- My Del.icio.us
- mydiamarks
- mydrops
- Myegy.me
- My Events in Heap CRM
- My Foobar2000 Controls
- MyFoxyWeb2
- My GMail Button
- My Homepage
- Myibidder Auction bid sniper for eBay ("Snipe it")
- My Image Here
- My IMFU
- My IMToolbar
- MyIP
- My IP Viewer
- MyJoyJar ToolBar Button
- MyKanji
- Mykareer.com
- My Keyboard Navigator
- MyMatrix
- MyNA Client Profile Manager
- myNotify
- MyOneSearch – The Best Way to Search
- MyOneSearch–The Best Way to Search with Microsoft
- My Password
- myphone.gr
- MyPH Up - MyPH.us Image Uploader
- My Portal
- myq.im - QR Image Code decoder
- my realm
- MYS
- My Screen Sharing
- My Search Toolbar
- My Security Search Bar
- my site 1.0
- Mysites - the best speed dial and start page
- MySocial 24x7 Bar
- MySocialCloud
- MySpace.Censor
- MySpace Blog Editor
- MySpace Friend Renamer
- MyStickies
- mySupermarket Recipes
- MyTabs
- MyTaH
- My Tasks in Torch Project Management
- MyTracking
- myurlbar_a
- MyVmarks Tools
- MyVocal
- MyWebSteps
- My Weekly Browsing Schedule
- My Wish List
- MyWords
- MyxerMagic Web Extensions
- My Yandex.Fotki Uploader
- My Youtube™
- N-WAX
- N0HR Propfire
- Nachofoto FotoMarklet for your images and photos
- Nagblock Standard
- Nagios Checker
- Naijabee Bookmark Manager
- Najdi.si orodna vrstica
- Named anchors
- NameID Easy Login
- NameWorldwide
- NAMFox
- Nanowrimo Meter
- NapoliPassion
- narrow_pantip
- narsytuvas
- Naruto-Arena Forum Themes
- NASCAR Interactive Theme
- National Geographic NewTab
- Native MathML
- Naukri.com Add-On
- naukri.com Toolbar
- Navibar
- Navigate the Bodybuilding .gr Forum
- Navigate Up
- Navigational Sounds
- Navigator for renren.com
- NBP currency
- NCBO API Key
- NDselector
- Near Real Screen Sharing
- NeatDigit forum
- NeedleSearch
- Neeed button
- Neo Diggler
- neoe-block-firefox
- Neon Highlighter
- Neopets Toolbar Add-on
- Nepali Patro
- Nepali Text2Speech
- netboard.me
- NetCopy
- Netcraft Anti-Phishing Extension
- Netflix Star
- Netflix Travelist
- Netherlands-newspapers
- Net Notes
- Netograph
- Netopi
- Netscape Link Pad
- Net Tuts
- Net Usage Item
- NetVideoHunter
- Netvouz buttons
- Netwalk
- Network Activator (HP)
- Network Activator (NS)
- Network Activator (PALLADIUM)
- Network Bandwidth Saver
- new-zealand-newspapers
- New Add-on Bar
- NewEgg Button
- NewEgg Toolbar
- NEW Glasser by SzymekPL
- NewIPNow.com Proxy Switcher
- New metroTab
- New Old Menu
- New Paltz Theme with Personas Interactive
- New Posts
- News
- News Assist
- NewsBar
- newsBgEmbedNews
- NewScrollbars (aka NoiaScrollbars) [Fx/Tb 10-56]
- Newscurve
- NewsFox
- NewsGrabber
- Newspatio
- Newssitter - News Sidebar and Feed Reader | RSS
- News Stream - إشعارات الأخبار
- NewTab&Swipe Navigation
- New tab = A Movie to Watch + Firefox Reading List
- NewTab Background Shuffler
- New Tab Button on Tab Bar
- New Tab For Android
- New tab from here
- New Tab from Location Bar
- New Tab Homepage
- New Tab Homepage View
- New Tab Image
- New Tab King
- New Tab Mod
- New Tab Position Toggle
- New Tabs at the End
- New Tab Searchbar
- New Tab Settings
- New tab toolbar button
- New Tab Tools
- New Tab to the Left
- NewTabURL
- New Tab URL
- New Tab Wallpapers
- New tab with homepage
- New Tweets
- NewXSMS
- New York's HOT 97 Hip Hop Interactive Theme
- New York Jets New Tab
- Newzan Extension
- NewzSocial
- nextpage
- Next Page Reader
- NextPlease
- Next Tab
- NextVid Stopper for YouTube
- NexusPad Bookmark
- NexusPHP torrent highlighter
- NFL's Indianapolis Colts 2010 - Official Theme
- ng-inspect
- ngePlurko
- NGI.it Menu
- NHL's Phoenix Coyotes - Official Theme
- NHL's Vancouver Canucks - Official Theme
- NH Pic-to-Game
- NH Pic-to-Game 2
- NH Pic-to-Game Update 4
- NicCage
- Nice Day (weather)
- Nicer Bugzilla Comments
- Nicer Media Pages
- Nice Translator
- Niche Watch Tool
- Nichols College Theme with Personas Interactive
- NicoFox
- Niederschlagsradar
- NietzscheDerp
- Nigeria-newspapers
- Night Launch Companion
- Nightly about:logo hotfix
- Nightly Tester Tools
- Nightly Tester Tools Lite
- Night Mode Eye Guard
- Night Mode Pro (Add-on SDK)
- NikzChat
- Nimble Smart Contacts
- Nimbuzz Webclient 3.2.4
- NinefoldFox
- Ninja Download Manager - Free Download Manager
- Nitefox
- NLIA Helper
- no
- No-Referer
- No-Script Suite Lite (Add-on SDK)
- NOA (Now On Air for FM radio stations)
- noAds
- no ads for baidu
- Noagro-ohyou
- NoCacher.v2
- No Close Buttons
- No Close Other Tabs
- NoContentDownloadLastDir
- No cookie for Google search
- Node Messenger
- Nodobe Viewer
- NoDoFollow
- No dots
- No Duplicated Authentication
- No Euro 2008 countdown
- No FB Tracking
- No Flash
- NOFS
- No Go Buttons
- nogoogle
- NoiaButtons [Fx45-56][Tb45-58]
- Noia Fox options
- Noise
- Noise Control
- No LDS Footnote Letters
- No More Blogger Redirect
- No More Holidays
- No More Install Delay
- NomOrVom - How clean is your takeaway?
- No Mouse
- No Native Notifications
- None-button
- Noojee Click for Asterisk
- noordubleclick v1.0
- noor v.1.0
- Nophish
- NoPic
- NoPluginBar
- NoRedirect
- Norfolk State U Theme with Personas Interactive
- North Carolina State Alumni Interactive Theme
- Northwest Christian U with Personas Interactive
- Norway-newspapers
- Norwell History Tools
- NoScript Security Suite
- Nos El-Kobaya
- No Sleep Download
- No Slideshows!
- NoSpell
- NoSquint
- NotAwesome
- NoTea
- Notefish
- NoteIt
- Notepad (QuickFox)
- Notesaver!
- NoteTake
- Notifications, Messages, & Alerts for Facebook
- Notifier (Telekom und T-Systems) für De-Mail Pilot
- Notifier for GitHub
- Notifier for Google™ Calendar
- Notifier for iCloud™
- Notifier for Inbox™
- Notifier for Outlook™
- Notifier for Tumblr™
- Notifier for Twitter™
- Notify
- No Tooltip Timeout
- NoTrace
- NO track
- Notre Dame Facebook Style
- No Twitter Follow Suggestions
- NoUn Buttons: Unmerge Back & Forward Buttons/Menus
- NovelRank
- Now Playing X
- NowPublic - Highlight
- noXSS
- nQuote
- Nudge Kick for Firefox (Beta)
- Nugget
- Nuke Anything Enhanced
- nulltxt
- NumberFox
- number generator
- Number Madness
- Numeral System Converter
- NumExt - Numbered Tabs
- Numpad Typing Drills
- nURL Suffix (new URL Suffix)
- Nutsygoodies
- NvS VisuTool
- nwtool
- Nyan Cat
- NyanIMG Firefox Plugin
- NyCrack
- nynorskvg
- nzbdStatus
- nzbFox
- nzherald.co.nz Live
- OakFlickr4PFF
- Oak Vocabulary
- OAWire
- Oberlin College Theme with Personas Interactive
- objectivepedia
- OblinQ
- ObPwd (Object-based Password) - Password generator
- Obtrusive JavaScript Checker
- Ocawa Toolbar
- OCPL Tracker
- OctoAudit
- Octotree
- Oculta Troll publico.es
- ODasp-Screen-Share
- Odds Anywhere
- oDesk Job Watcher
- ODFReader
- Odpadneš.sk - vyhľadávač zliav
- ODP Editor Tool
- ODRO Screen Sharing
- Off-campus proxy (MUN)
- Offcloud.com
- offensiveX
- Offers.com
- Official Furthia High Toolbar
- Official Kutless Theme and New Tab King extension
- Offline Page validator
- Offline QR generator
- Offline Restart Buttons
- OFOTÉRT Netszemüveg
- OG.NR; On The Ground News Reports
- OGame Fast Messages
- OGeneral Extension
- Ohio University Theme with Personas Interactive
- OID resolver
- oikumo
- Okapiland Search Toolbar
- OkosisTest1
- okvisited
- oldbar
- Old Bookmarks Sidebar
- Old Default Image Style
- Old Google Image Search
- Old Lion Fullscreen
- Old Location Bar
- Old Manage Bookmarks
- oldschoogle
- OldSpice Twitter Drop Shadow
- oldTwitter
- olesinriber
- oltalk
- oltalk-mobile
- Olympic Medals
- OMA LWM2M DevKit
- Omer Reminder
- OM New Tab
- Omnibar
- Omnibar Plus
- Omniref
- omnisequences
- OmniSidebar
- Omnivalidator
- omploader
- On.net toolbar
- OnAir_FM
- OneClick Installer for Wordpress
- One Click Proxy IP
- Oneindia Hindi menu
- Oneindia Kannada menu
- Oneindia Malayalam menu
- Oneindia Tamil menu
- Oneindia Telugu menu
- oneKeyboard
- onekey close, minimize on 'close'
- OneManga Manager
- OneTab
- oneview Tools
- OneWebLogin.com Tools
- online-dictionary
- Online.FM radio
- Online Appointment Qlinks
- Online Appointment Quick Links
- Online Bookmark Manager - StartAid
- Online Convert
- Online Coupons and Deals of top stores in USA
- Online Music Player
- Online Reload
- Online Slots
- Online Translator Toolbar
- Onload Script Some Document Files
- Only Minor Update
- OnlyMySites
- OnlyWire Browser Extension
- OnSIP Click-to-Call
- OnSIP Click-To-Call
- Ontotext S4
- OOD Combat Report Tool
- Oodle Sidekick
- Ook? Video Ook!
- Ookong - Amazon price history & more
- OopsTab
- Opandia - add on for Google
- Open Access Button
- Open Addons
- Open AdWords
- OPEN ALL IN TABS
- Open As Webfolder
- OpenAttribute
- Openattribute link
- OpenAttribute Picture Augment
- OpenBerg Lector 5
- OpenBook
- Open Bookmarks in New Tab
- OpenBox
- OpenCase.jp
- Openchaching Pretty Printing
- OpenDNS Domain Tagging Assistant
- OpenDownload
- Open Download Manager on Download
- OpenDownload²
- Open GMail (Google Mail) in new tab - toolbar icon
- Open GMail in a new pinned tab toolbar button
- Open Google Calendar with toolbar button
- Open Google Contacts with toolbar button
- OpenID for Firefox
- OpenID Login
- Open Image In New Tab
- Open in Browser
- Open In Chrome
- Open In Current Tab
- openinfocard Identity Selector
- Open in Google Docs Viewer
- Open in Google™ Translate
- Open in IE
- Open in nbviewer
- Open in Private Browsing Mode
- Open In RegEdit
- Openintabs-erase
- Open in Wayback Machine
- OpenInWindow
- Open IT Online
- Open Karachi Screen Sharing
- Open Link
- OpenLink
- OpenLink Data Explorer
- Open Link Host
- OpenLink HTML5 WebDB-to-ODBC Bridge
- OpenLink HTML5 WebDB-to-XMLA Bridge
- Open link in...
- Open Link In Current
- Open Link in New Tab
- Open Links!
- Open Long Url
- Open Mathematical Encyclopedia
- Open Multiple Locations
- OpenOffice.org Menu
- openPics
- Open preset URL in Private Browsing window
- Open Profile Folder
- Open RegEdit Key
- OpenReviewProject - Review The Internet!
- Open Rewrite Firefox Extension
- Open Search Notification
- Open Secure
- Open Serial Tabs
- Open Some Bookmarks
- OpenStreetMap View
- Open sync tabs button
- open tab count widget
- OpenTabs
- Open Tabs Next to Current
- Open Tabs Next to Current Plus (Discontinued)
- Open TortoiseSVN
- OpenUp
- Open URIs
- Open URL
- OpenURL Referrer
- OpenWater Platform Bulk Downloader
- Open Wiki Edit Page
- OpenWishes Birthday Reminder
- Open With
- OpenWith
- Open with Livestreamer
- Open With Photoshop
- OpenWLANMap GeoLocation
- Operator
- OperaView
- Ophthalmologylive Screen
- OPIE (Ordered Preference Import/Export)
- OpinionCloud (for YouTube & Flickr)
- Oplao Weather
- OPML Reader
- OPML Support
- Optimoz Tweaks
- Optimy Search
- Options Menu
- Options Toolbar Button
- OQFA - Image Hosting Cargador Online
- O que e isto?
- OraDB Error Code Look-up
- OrbThis
- OrchMail
- ordily
- Ordino
- Organize Status Bar
- Oritor Desktop Streamer
- Oritor Screen Capture
- Oriya fonts package
- Orkut Black Edition by Hemant Pawar
- Orkut Helper
- Orkut Linkifier
- Orkut Scrapbook Searcher
- Orkut ScrapEasy
- Orkut Scrap Helper
- Orkut Scrapper
- Orkut Toolbar
- oScan
- Oscar HQIC HMP-Central Brampton FHT -
- OsmJumper
- OSM Links
- OSM Widgets
- oSokker
- Other Addon
- OTRS Watcher
- Outlook Button
- Outlook simple watcher
- Outlook Web App ( + Reminders)
- Outlook Web App Notifications
- OutSidebar
- OutWit Docs
- OutWit Hub
- OutWit Images
- OverbiteFF
- Override User Agent
- OVH VOIP Click2Call
- Ovulation Predictor
- OWF Chat Box
- Ownpage
- Ownza Firefox Extension
- OZ Bargain Hunter
- Ozgameshop Price Checker
- P.U.K a rude PopUp/Under Killer(prev: killjasmin)
- PackageMapping.com Extension
- Pacman
- PAcMan
- Padlet Mini
- Padlock
- Padlock-Or-Eye
- Padma
- pageaddict
- Page Content Estimator
- Page Control
- Page Coverage (Selenium IDE)
- Page Dark
- PageDiff
- Page Hacker
- Page Info Button
- Page Info Forms and Links
- Page Meta Manager
- PagePlaylist
- pageQlip
- PageQuery
- Page queue
- PageRank
- Page Rank Checker
- PageRank Client
- Page Reload Study 1
- Page Ruler
- Page Scheduler
- PageShortcuts
- Pageshots for Baidu
- Pageshots for German Search Portals
- Pageshots for yandex
- PageSlices for Firefox
- Page Source
- PageStyle2Tab
- PageTimerLite
- Page Title in URL Bar
- pagetokeep
- Page to Popup
- PageTweak - Ad Blocker, Video Downloader, Translator...
- PageTweets
- Page Update Checker
- Page validator
- PageZipper
- PageZoom
- Page Zoom Button
- PagMan
- Paidshop
- Paint It Black!
- Paizo Campaign Tools
- PajacykXPI
- Pajaswebb - alternativ konsumentmakt
- Pakistan-newspapers
- Palette Grabber
- Palettes
- PALMLINKER::COM Add
- PALMLINKER::COM Sidebar
- Pan
- PanabeeMini
- panchang
- Panda Daily News & Inspiration
- Panel & Notifier for Gmail™
- Panel Unarrower
- Panel View for Google™ Keep
- Panemoticon
- Panic
- Panic Button
- panther front-end
- Papaly - Bookmark Manager Speed Dial
- Paper for Instapaper
- Papers Online Reading List
- PaperWall NewTab
- Pappayameet Addon
- Parafia.biz Helper
- Paragaranti Döviz
- Paragrasp
- Parallel Universe
- Parasite
- Pardus Copilot
- Pardus Utility Collection
- Parental Controls & Web Filter from MetaCert
- Parent Folder
- Parevu English-Gujarati Dictionary
- parolu
- Parse HTML For Blogger Template
- ParseURL
- Parsiblog Extension
- Parsys
- Pasa password generator
- Pasar Kode Fast Toolbar
- pass-manager
- Passera
- PassFF
- passgen
- PassIFox
- Passive Cache
- PassiveRecon
- passLikeW8
- Passport
- Password Age Visualizer
- Password Analyzer
- Password Backuper
- Password Engine
- Password Exporter
- Password Finder
- Passwordgen For Firefox 1
- Password Hasher
- PasswordMaker
- Password Mask Changer
- PasswordProtect
- Password Reuse Visualizer
- Password Tags
- Password Tote
- PasteAndGo
- Paste and Search (Forms) reloaded
- Pastebin.com
- Paste Email (original)
- Paste Email Plus
- pastego
- PasteIP
- Paste Middle And Go
- Paste Onto New Tab Button
- PastePalette
- Paste Quote
- PasteREF
- Paste to Tab and Go
- PatentlyUseful(tm) For the USPTO
- PawsTrail
- PAYBACK Internet Assistent (PIA)
- PayPal Instant Transfer Zapper
- PayPal Wishlist extension
- PC-Pros Safety Net
- PC and Mac Software Deals from BitsDuJour
- PCEkspert.com Forum Meni
- pcfault Toolbar
- PCGamingWiki Browser Extension
- PCMan BBS Extension
- PCM Tools
- PC Perspective Site Navigator v2
- PcSeven Menu
- PcTechnology Navigation Menu
- Pctwix
- PDF-Google-Finder
- PDF Download
- PDF Ebook Search Engine and Reader
- pdfit
- PDFMyURL
- PDF Plugin for Firefox on Mac OS X
- PDF Search Engine and PDF Viewer Toolbar
- Peachphone : virtual phone (Android/iPhone)
- Peak FindIt
- Pearl Crescent Page Saver classic screenshot tool
- Pearltrees
- Peece.Net download Helper
- Peek
- Peekko Chat
- PeekURL
- PeekYou Status Bar
- PeerFly Stats
- PeerIndex
- Peers - Instant Search
- Peerscape
- pega
- Peivastha
- pememarks2
- Pencil
- Penny Auction HUD
- Pennyful CashBack India
- Pennypacker
- Pentadactyl
- People Lookup
- People Search and Public Record Toolbar
- PepFeed
- Pepperdine U Theme with Personas Interactive
- Perapera Chinese-French Dictionary File
- Perapera Chinese-German Dictionary File
- Perapera Chinese Popup Dictionary
- Perapera Japanese-French Dictionary File
- Perapera Japanese-German Dictionary File
- Perapera Japanese-Russian Dictionary File
- Perapera Japanese Popup Dictionary
- Percula
- Perez Hilton Celebrity Gossip & Entertainment News
- Perfect Redirector
- Performance-Analyser
- PerformanceTest
- Perk for Firefox - Earn Rewards on the Web!
- Perkthyes
- perm.ly
- Permanent List-all-tabs Button
- PermaTabs
- PermaTabs Mod
- Permissions Auto Registerer
- Permit Cookies
- Perplexbar
- Perseus
- Persian transliteration
- Persib-Mania
- Per Site Security Manager
- Personal Menu (Personal Firefox Button)
- Personal Titlebar
- Personal Video Commander
- Personas Expression
- Personas Interactive Theme Engine
- Personasizer
- Personas Plus
- Personas Rotator
- Personas Shuffler
- Personas Windows Classic Statusbar
- Persona Switcher
- Perspectives
- Pertinkina - (C) Visuddhi
- pesticide
- Petition Signer
- Petname Tool
- PGA Forums Menu
- PGN Visor
- Pharmevomedweb Screen Sharing
- Phashword
- Philippines-newspapers
- Phish Advisor
- PhishTank SiteChecker
- Phoenix
- PhoneLooks - Reverse Phone Lookup
- Phone Number Lookup
- Photo4u Menu
- Photobucket Uploader
- photofoxx
- Photo Importer
- Photolize
- Photostream Transloader
- phpBB Advanced Quick Reply Quote Edit
- PHP Developer Toolbar
- phpGedView search
- PHPkod
- phplangeditor
- PHP Lookup
- phpMyAdmin Timeout Preventer
- Phrasemarker
- Phrogsy
- Pi
- PicBlow
- PicBox Uploader
- Pick & Save Images
- PickABook Toolbar
- Pickemfirst Fantasy Sports
- PickMe Web - Online Social Bookmarking
- Pick Text
- Pick That Color
- Picodi - all discounts in one place
- PicPasso
- Picpicfind
- Pics9.com Simple Image Uploader
- Picscrazy right-click
- Picsearch Highlight
- Picsisgreat - Free image sharing
- PicsOrLinks
- Picstash Firefox Plugin
- Pic Style - Checkerboard
- Picture2Life - Edit Photos, Create Collages & Animate Pictures
- Picture Blocker
- Picture Browser
- PictureFox - ImageFlow for Amazon
- Picture in Play
- PictureMate - View hidden Facebook pictures
- PictureThis
- PictureUpload.US Image Uploader
- Picture Zoom Plus(+)
- PictuTools
- Picup Free image hosting
- Piedmont College Theme with Personas Interactive
- Piggy's Page
- Piigeon
- pikanus
- Pikiz
- Pimp my Campus Virtual!
- Pimp My Facebook Skin!
- Pimpoflage - Auto Hide Options for Status Bar and Navigation Bar
- Pinboard
- Pinboard Extension
- Pinboard IncSearch
- Pinboard Quick Bookmark Button
- pinchy
- Pinfeels collect button
- Pinger
- PingFire
- Pingler
- PingPong
- PinImage
- PinkTabs
- PinkTheme Pink Pack
- Pinkysearch
- Pinnacle Gradesuite Test Editor
- Pinned GMail
- Pinned Google Calendar
- Pinned Google Drive
- Pinned Messenger
- Pinned WhatsApp Web
- Pinned Window extension for Firefox
- PinPoints
- Pins
- Pin Tool
- PIQ IT
- Pirate Hook's Banana Extension
- Pix2Fone
- pixchan_addon
- Pixel Perfect
- PixelZoomer
- pixiv-emote
- Pixiv Stack Preloader
- pkrss
- Places' Tooltips
- PlacesCleaner
- Places In Tabs
- Places Maintenance
- Places to CSV
- Places’ Full Titles
- PlainOldFavorites
- Plain search
- Plain Text Linker
- Plain Text Links
- Plain Text Offenders
- Plancast Event Adder
- PlanG
- Planio Toolbar
- Plan route on any webpage with TomTom Routeplanner
- PlasmaNotify
- Platial Grabber
- Platypus
- Play.com Price Tracker Sidebar
- Play All
- Play DI.fm using HTML5, instead of Flash
- Play drums!
- Playlistar.com Save MP3 Cross-Linking Bookmarklet
- Pleasuredome Tracker Ratio addon
- plpage
- Plucki
- plugCubed
- PlugIn-Checker
- Plugin Disabler
- Plugin Safety
- Plugins Toggler
- PluginWatcher
- Pluribo: Instant Summaries
- Plurk2Plurk
- PlurkBell
- PlusFixer
- Plus One Any (+1 Any)
- PN-Buttons
- POC Revevol
- Podcast Player Prime
- Podes
- Podio PDF editor for ESTEQ
- PoesieRacconti Toolbar
- PoE Stash Searcher Plus
- Points Booster
- Points Can Not Motivate Me
- PokeTalk
- PokHelper
- Poland-newspapers
- Polar Bear Page
- Policeman
- Policy Manager
- PoliticianSearch
- POLITICO Toolbar
- politics.ie speed and privacy add-on
- PolyChrome
- polyglop
- Polyglossum NET
- PONG! Multiplayer
- PookyTouch
- Pop-up Controller
- Pop Block
- Popbook
- Popular Search
- Popup ALT Attribute
- PopupMaster
- PopupSound
- PopVideo
- Port Scanner
- Portugal-newspapers
- post 2 del.icio.us
- post2friendica
- PostBeyond
- Poster
- Post to Glimpse (BETA)
- POTO Sidebar Extension
- POW -- Plain Old Webserver
- Power Bookmarks
- Powerbot for Gmail
- Power Close
- Power Debugger (Selenium IDE)
- Power Rangers Tribute New Tab
- PowerSeo
- Power Twitter
- Powr of You
- PoxBar
- PPSOE
- PPX Version v3.1
- Prakash Screen-sharing ext
- Pramukh Type Pad
- Pray Times!
- Precise Clear History
- PrefBar
- Preferences Button
- Preferences in Tools Menu
- Preferences Monitor
- Preferential (New GUID)
- Prefsearch
- Prefswitch
- Pregnancy Ticker
- Preisspion
- Preloader (for Firefox)
- Presdo Event Calendar Organizer Doodad
- Presentation MathML Polyfill
- PresentCode
- Preserve Download Modification Timestamp
- President Ahmadinejad Countdown
- Preslovar
- Prettier Bookmarks Toolbar
- Prettify paragraphs
- Pretty Good ID
- Pretty Install
- Prevent Out Of Virtual Memory Crashes
- Prevent Tab Overflow
- Prevent writing passwords without SSL
- previewr
- Previous Folders
- Previous tab highlighting
- PrevNextArrows
- PRFrame
- Priberam Dictionary of Portuguese Language On-Line
- PriceAdvance
- Price Alarm - Amazon Price Tracker
- PriceBlink - Price Comp & Coupons
- PriceCanada.com Right-Click Search
- Price checker in NOKAUT
- PriceDrop
- Price Expert
- Price Genie
- PriceGoblin
- PriceGong - Automatic Price Comparison Addon for Firefox.
- PriceJump
- PricePal
- Price Protectr Toolbar
- Price Rocket
- PriceTrace
- pricewatchforamazon
- PriceZombie, Price Tracker & Price Comparison
- Primercato Proxy Utility
- Print
- Print/Print Preview
- Print Button is Print
- printclose
- Print Context Menu
- Print Edit
- Printfriendly
- Print Hint
- Print Image
- PrintPDF
- Print Preview
- Print Preview
- Print Preview Button
- Print preview button (restartless)
- Print Preview Toolbar Button
- Printrocket
- Print Without Ads
- prithvionline
- Priv3
- Priv3+
- Privacy +
- Privacy Badger
- Privacy Lock
- Privacy Protector
- Privacy Protector Plus
- Privacy Settings (Embedded)
- PrivacySuite
- Private Browsing
- Private Browsing Auto-Exit
- Private Browsing Command Line Flag
- PrivateBrowsingHistoryRecovery
- Private Browsing Personas (FF51+)
- Privly
- ProAktiv
- Process Library
- Process Toggle
- ProCon Latte Content Filter
- ProductBee - Lowest Prices, Coupons, and Reviews!
- producteev RTL interface
- Professor X
- ProfileComplete
- Profile Folder Button
- ProfileFuze
- ProfileSwitcher
- Profilist
- ProfilistPortable
- Profilwatcher
- Profound.Censor
- Progre
- ProgressMeter
- Project Compass
- ProjectGames Letzte Forenposts
- Project M Twitch Fix
- Prolific
- Pronounce
- Propeller Friends' Activity Sidebar
- Propeller News
- Propeller Sitemail Notifier
- Propeller Tracker
- Proper Buttons
- Property Management Dashboard
- ProPilkki2
- Prostetnic highlighter
- Prot-On
- Protect-Access
- Prothom-alo.com news widget
- Proto.io print helper extension
- Proverbs
- ProVision.bg home page button
- prowler
- Prowork Notifications
- ProxifyMyFox
- Proxmate - browse the web with confidence!
- ProxTube - Unblock YouTube
- Proxy Authentication
- ProxyBar
- ProxyChanger
- Proxy Finder (IP Switcher)
- Proxy List Pro
- ProxySel
- ProxyToggle
- Proxy Tool
- Proxy Toolbar
- Proxy Toolbar for Firefox 3.6 by Sandro Wittwer
- Przetłumacz z ling.pl
- Pso2Fox
- PswGen Toolbar v2.0
- Pterosaur
- ptl.me
- Ptube Unblock Youtube
- Public Fox
- PubMed-EX
- PubPeer
- Punjabi Gurmukhi fonts package
- PunkSPIDER
- Puny URL
- Pupe Helper
- pure amazon
- PureCloud Screen Sharing Helper
- Pure View
- Push To JDownloader
- Push to Kindle
- puttypinger
- Puzzle
- Puškice FON
- PwdHash
- Pwee URL Shortener
- pwgen - Password Generator
- PWS Toolbar
- Pyrus
- Qantas Airways Toolbar
- Qatar Prayer Times
- Qileke Collect
- QIRIMTATARCA Til Destesi (Crimean Tatar Lang Pack)
- QLDP: QUAKE LIVE Demo Player
- qlue.net firefox addon
- QQBookmark
- qqtt.org gaming streams notifications
- QR code generator Lite
- QR Code Image Generator
- QrCodeR
- QR Decoder
- QrEverything
- QRL
- QRLink Maker
- qrshortnshare
- QRSrc
- QSensei Book Finder
- Quebralink - Desprotetor de Links
- Query Bench Module - Data transfer v1 to v2
- Query Bench Module - Google
- Question Marks History
- Queue Context Menu
- Quick Access
- Quick AnKi
- Quick Calculator
- Quick Color Switcher
- Quick Context Search
- QuickDate Calculator by Enoron.com
- Quick definition (Beta)
- Quick Dictionary Lookup from BeeDictionary.com
- QuickDrag
- Quick File Post
- Quickfire
- QuickFrame
- QuickImage
- QuickInbox Generator
- QuickJava (For FF Versions 56 AND BELOW only)
- QuickJS
- QuickLinks
- Quick Links
- QuickList
- Quick Locale Switcher
- Quick Maps
- Quick Markup
- QuickNote
- QuickOpen
- Quick Page Switcher
- QuickPageZoom
- QuickPageZoom2
- QuickPasswords
- Quick Paste
- Quick Phone Search
- Quick Preference Button
- QuickPrint
- Quick Protect Shorten Link
- quickProxy
- QuickProxy
- QuickResponse
- QuickRestart
- Quick ROT ciphers
- Quick Search
- QuickSearchBar
- Quick Tab
- QuickTfL
- QuickToggles
- QuickToolbars
- Quick Torrent Search
- QuickTui
- QuickView
- QuickWiki
- Quidco Cashback Reminder
- Quiet Read
- QuietUrl
- quip
- Quit Firefox
- quit gcli
- Quitomzilla
- Quiz Addicts' Toolbar
- Quizzes
- quora-nologin
- Quorafox | Quora for Firefox
- Quora Share
- Quora Sneak
- QUOTE.fm
- QuoteURLText
- Quo Vadis?
- Quran
- Quran Player
- quTextMark extension and SciMozFB Plugin
- Qwant
- Qwara Toolbar
- QwickUp
- Qwisk - share, discover and discuss cool pages
- Qworum for Firefox®
- R-kiosk
- r/chess pgn viewer.
- Rabbit TV Plus
- RABS
- Racing Motorcycles New Tab
- RADAR Disambiguation
- RadialContext
- RadialContext-mz
- Radikal 4 saat
- Radikox
- Radio Eksen
- Radio Eksen Ticker
- RadioGNU Scrobbler
- Radio Milwaukee Last.fm
- RadioNonsense.com Plugin
- Radio Paradise Toolbar
- Radio Record
- RADIO STANICE UŽIVO
- Radio Station Search
- Rad Notepad Yahoo Notepad Exporter
- Raed Tihs!
- Rage3D Forums Menu
- RailsBug
- Rainbow Color Tools
- Rainbowpicker
- Rainbows New Tab Theme
- Raindrops Tab Theme Wallpaper
- RainFox
- RAMBack
- Random11's Buttons
- Random Bookmark From Folder
- RandomMessage
- Random Nitrome Game
- Random Select Radio Buttons
- Random Southpark Episode
- Random Theme Switcher
- Random Theme Switcher
- randomUserAgent
- Random Video Chat
- Rangam
- Rangers First
- Rangers Football Club Interactive Theme
- RankJIT
- Ranks NL Page Analyzer
- Rantings of an IB Student Blog Updates
- rapidfire
- RapidFox
- RapidIMG
- RapidIMG.org Image Uploader
- RapidleechLink
- RapidShare Downloader
- RapidShare DownloadHelper
- Rapidshare Helper
- Rapidshare Remote-Upload Helper
- Rapise Plugin for Firefox
- Rapportive
- Rately
- RatePoint
- RatherGood Translator
- Ratings Preview for YouTube™
- Ratio Animé Latino
- RawSugar - Tag and Search
- raw vision
- rCache Collector
- RcVCite
- RDFa Developer
- RDF Viewer
- rDiablo Release Countdown
- rDiablo Theme Selector
- RDP Inspector
- RDS bar (seo: pr, dmoz, alexa, seomoz)
- Re-Pagination
- RE-Pagination (obsolete)
- re:act
- Reach
- Readable SafeBrowsing
- Read Easily
- Reader
- Readeroo
- ReadFast
- Read Haaretz for free #2 ! לקרוא את אתר הארץ בחינם
- Read Later
- ReadPanel
- Readr Fo' Reddit
- ReadySys
- Real-time Amazon Worldwide price drops. True deals
- Real emotions for Gmail, Yahoomail and Hotmail.
- Real Estate Investing Toolbar
- Real Estate Peruser
- Real Fullscreen
- reallyremember
- Really Simple Sticky
- RealmButton
- Real NBA.com
- RealTimeWeekly ScreenSharing
- Reasy
- Rebrand
- Rebump
- Recherche Allocine
- recipefox
- Recognize It
- Record Network Activity
- Record Site IP
- Recruit Screen Sharing
- Red1 - Facebook downloader
- Reddcoin Tip Platform
- Reddit-Liquid-Streams
- Reddit Button
- Reddited
- Reddit Enhancement Suite
- Reddit Gold Kidding
- Reddit History
- Reddit Mail Checker
- Reddit Mutilator
- RedditNotifier
- Reddit Opener
- Redditrepost 0.1
- Reddit Reveal
- Reddit Search Quickfix
- Reddit Skwisgaarifyer
- Reddit Submission Finder
- Reddoodle
- RedFlagDeals.com Toolbar
- Redfly SEO Global For Google Search™
- Redirect Bypasser
- Redirect Check Client
- Redirector
- Redirect Python Docs
- Redirect Remover
- Redmine Toolbar
- reduce IFrame
- Red vs. Blue
- RefControl
- Reference Maker
- Ref for Gmail
- REFit
- reflector
- Reframe It
- Reframe It - Post & share comments on any webpage
- RefreshBlocker
- RefreshDash
- refspoof
- Regchan Firefox Plugin
- Regex Find
- Regional Route
- Regular Expressions Tester
- Rehost Image
- rejector.ru community extention
- reKommend
- Rel-Payment Button
- Related How-To Videos Sidebar
- Relaxed Lok Lok Facebook Chat Code
- Relaxed the HTML Validator
- Reliance Netconnet+ Data Usage
- Reliby
- ReloadAll!
- reloadalltabs
- Reload Dat Frame
- ReloadEvery
- Reload non-pinned tabs
- Reload PAC button
- Reload Plus
- Reload Tab On Double-Click
- Reload Tabs Progressively
- Reload when MiddleClick on Urlbar Plus
- Remarkerbe
- Remember Certificate Exception
- Remember Certificate Exception 4.0.*
- Remember Mismatched Domains
- RememberReward
- RememberToolBar
- ReminderFox
- RemodelOrMove.com Web Clipper
- Remoku
- Remote Control
- Remote Developer Tools Server
- RemoteLiveReload
- Remote XUL Manager
- Remove/Crop-to Selection
- Remove All Cookies
- remove all facebook ads
- Remove Cookie(s) for Site
- Remove Cookie for Google Account Chooser
- Remove FB Ticker
- Remove Google Tracking
- Remove Google Tracking for Copy
- Remove It Permanently
- RemoveLocale
- Remove New Tab Button
- Remove Resizer
- RemoveTabs
- Remove Yahoo Tracking
- rename!me
- Rename Tab Title
- Renkoo Toolbar
- Renren Ad Remover
- Rental Application
- Repi partilha de ecrã
- Replace Bookmark
- ReplaceForbiddenPage - Iran
- Replacetabs Extension
- Replace URI
- ReplayDIRECTOR Add-on for Firefox
- Reply Now
- Reply Robot
- Repost LJ
- reprductorAnimacionatica
- Reputation Search
- reQall on firefox
- Request Access
- Request Assistant
- RequestPolicy
- RequestPolicy Sync
- Request Tracker Tracker
- Research Word
- Reseller Ratings
- Reset Kiosk
- ResetSearchbar
- Reset Search Preferences
- Reset Search Timer
- Resizeable Textarea
- ResizeIT
- ResizR
- Resolve IP
- Resource Finder
- ReSozluk
- response-timeout-24-hours
- RESResearch
- Restart
- Restart again
- Restart application
- Restarter
- Restart Extension
- Restart Firefox
- Restart Firefox
- Restart Jetpack
- Restartless App Button Quit
- Restartless Context Search
- Restartless Restart
- Restartless Speed Dial
- Restart manager
- Restart My Fox
- Restaurants in Amman Jordan
- RESTClient, a debugger for RESTful web services.
- Restore -remote
- Restore Control
- Restore Open_External
- Restore View Source for Firefox 6+
- ResultRank
- resumeLater
- Resume Video
- Resurrect Pages
- retitler
- Retro Find for Firefox 10*
- Retweeter for Twitter
- Reuse Home Page
- Reuse Tab
- Revelateur
- Reverse Image Search
- Reverse Text
- Reverse Translator
- ReviNet Revify
- Rewind/Fastforward Buttons
- Rewrite HTTP Headers (JS)
- Rewrite HTTP Headers (JSON)
- rfc-link
- RHP Check Mate
- RI4M-Menu
- RickRemoval
- Rickroll Detector
- Rifflex
- Right-Aligned Bookmarks Bar
- Right-Click-Link
- Right-click close
- RightBar
- Right Click DuckDuckGo
- Right Click Upload for sdumps.net
- RightClickXSS
- right context
- Right Encoding
- Right Links
- Rightmove Tweaker
- Rights To Close
- RightTasks for Gmail
- rikaichan
- Rikaichan Japanese-English Dictionary File
- Rikaichan Japanese-French Dictionary File
- Rikaichan Japanese-German Dictionary File
- Rikaichan Japanese-Russian Dictionary File
- Rikaichan Japanese Names Dictionary File
- RingDNA Softphone
- RIVS Screen Capturing
- RIYUSAKI
- RKOL Status
- RLU.Ru Short URL Generator
- RMB2NZDRateViewer
- RndPhrase
- Robinbook
- roboxt!
- Rock The Deadline
- Roligasidor & kossan.se toolbar (SWEDISH!)
- rollApp File Opener
- Romania-Newspapers-Dir
- Roomy Bookmarks Toolbar
- Rooster Teeth Site Extender
- rotab
- Rotate Image
- Rotating Tiles Picture Puzzle
- RotoGrinders Baseball Reference
- RotoGrinders Basketball Reference
- RotoGrinders FanDuel Tools
- Rotor Throbber
- Router Status
- RPN Calculator Bar
- RPNET Downloader
- RPNET Download Helper
- RPNet Helper
- RSE Tools
- RSFind!
- RSFind! Mod
- RS Links
- RSS Editor
- RSS Feed Icon in Navbar
- RSS Icon for Brief
- rssPlayPen
- RSS Ticker
- rsstodolist
- RSS validator
- RSSy
- rt.fm v0.1.4
- RTB Chat Box Expander
- RTC
- RTLzr
- RTSE Lite
- Rtuk
- RubNub for YubNub
- Rubrika4Vodafone
- ruler_guides
- Rumola - bypass CAPTCHA
- Runkeeper Toolbar Button
- RunnersConnect Unit Converter
- RunWith
- Rus2Lat
- Rush Buyer
- Russia-newspapers
- Russian Bar
- Russian hot keys bugfix
- Russ Key
- ruTorrent WebUI
- Rutracker.Org Addons
- RvrtRip
- Ryebox Bookmarks
- RYM Enhancer
- Rádio MK
- S-Net Connect
- S3 Organizer(S3Fox)
- S3.Translator
- s3://
- SAASPASS Single Sign-On 2FA Authenticator
- SABDA - Alkitab Linker
- SABDA - Kamus
- SabnzbdFox
- Sadakmap search and URL marker
- SAdder
- Safari View Win
- SafeCache
- Safeguard
- SafeHistory
- Safelinking
- safer-route
- SafeSearch Off
- Safety Redirector PRO [BETA]
- SafeWallet Password Manager - Firefox Extension
- saganIZER
- Sage
- Sailor Shortcuts
- Saint John's U MN with Personas Interactive
- Saint Joseph's College IN w/Personas Interactive
- Saint Mary's U Theme with Personas Interactive
- Salesforce inspector
- Salesforce Quick Search
- Salr for Firefox
- SamePlace Instant Messenger
- samfind Bookmarks Bar
- Samford University Theme with Personas Interactive
- SAML-tracer
- Sampark
- Samsung Sync
- san-pi
- San Francisco St Theme with Personas Interactive
- Sanitisminau
- Sanskrit WordNet ( संस्कृतशब्दबन्धः )
- Santa Theme with Personas Interactive
- SapLogon tool
- SAP Support Note QuickLaunch
- Sauce Launcher
- Saudi-Arabia-newspapers
- Save-To-Read
- SaveAll!
- Save and Organize with Clipix
- Save as EPUB
- Save as PDF
- Save Back to File from DOM
- SaveBomb downloader
- Save Complete
- Saved From URL
- Saved Password Editor
- Saved Passwords Button
- Save File to
- SaveFrom.net helper all-in-1 / youtube downloader
- Save Image in Folder
- Save Images
- Save Images to Piccsy.com
- SaveLink
- SaveLinkApp
- Save Link in Folder
- Save Links on ALT-Click
- SaveMemory
- Save Money on eBay
- Save My Tabs
- Save Page As
- Saverg
- Save Session
- Save Session
- Save Text Area
- Save Text To File
- Save to SlideBatch
- SaveURI
- Save Your Facebook Content
- SaveYourSub
- Savings Account Rates Monitor
- Savrock.com WHOIS Search tool
- SavvyConnect
- Sawab & Inspiration
- Sawiris blocker
- sayhai toolbar
- SB2
- SBB Toolbar
- SBO Odds Converter
- SC2 Ratings
- Scab 2 beta
- Scalar Workbench
- Scan2Login
- ScanLife Add-on for Firefox
- Schillr Stereoscopic 3D Viewer
- Scholar H-Index Calculator
- Scholarometer Sidebar
- Schooler
- Sciagaj.org Button
- Science Stack - Academic select and search
- Scientific Calculator
- Scientific Calculator Plus
- SciZone
- ScoobyDeal Tracker
- ScoreWatch
- Scotty McCreery Theme with Personas Interactive
- Scramble!
- ScrapBook
- ScrapBook AutoSave Improved
- ScrapBook CHM Creator
- Scrapbook Lite
- ScrapBook MAF Creator
- ScrapBook Plus
- ScrapBook X
- Scrapbook X CopyPageInfo
- ScrapBook X File Converter
- ScrapBook X MAF Creator
- SCRAPfy
- Scratchpad
- Scratchpad Button
- Scratchpad Editor
- Scratchpad Snippets
- screen-sharing-st
- Screen-sharing extension
- Screen-sharing extension for OpenTokRTC.com
- Screen-sharing extension for xplorify.net
- Screen-sharing for upwork.com
- Screen/App sharing
- Screen Capture Elite
- ScreenCapturing
- Screen Capturing
- Screen Capturing Extension
- Screen Capturing for the UAPV
- Screen Capturing for xiejieyi
- Screen Draw
- Screengrab
- Screengrab!
- Screenshare
- Screen share in Firefox
- screensharextensionallprotutor
- Screensharing
- Screensharing Extension for Firefox
- Screen sharing extension for VarsityTutors
- Screensharing Extension for Veeting Rooms
- Screensharing FieldVision Meet
- Screen Sharing for ProVideomeeting
- Screensharing for Solved
- Screensharing for VoxSun Conference
- Screensharing Helper for 1click.io
- Screensharing Meet With Me Now
- Screenshot
- Screenshoter
- ScreenShot on Fail (Selenium IDE)
- Screenshot Pimp - Screengrab, Screen Shots, & Save Selection
- Scribd Slurper
- ScribeFire Classic
- ScribeFire Next
- Scriptify
- Scriptish
- Script Skipper 3.x
- Scripture Window
- scrollBack
- Scrollbar Search Highlighter
- Scroll here
- Scrolling headers (deprecated)
- Scrollkey
- Scroll Menus On Drag
- Scroll Search Engines
- Scroll To Top
- Scroll to Top/Bottom
- ScrollUp
- Scroll Up
- Scroll Up Folder
- ScrollyFox
- Scryve
- SCs Currency Converter
- Scuttle
- SCYLighter
- SDL Clipboard Extension
- SDownload
- SD Tools
- SE-AutoReviewComments
- Search++ Menu addon for academics (DOI, Scholar)
- Search4Later
- SearchAll
- Search Amazon
- Search and e-mail notification widget
- Searchbar Autosizer
- Searchbastard
- Search Bleach
- SearchBox Companion
- SearchBox Hotkey
- SearchBox Sync
- Search By Image (by Google)
- Search by Image for Google
- SearchChips Bookmarker
- Search Cloudlet for Google, Yahoo and Twitter
- SearchCopy
- SearchCrumbs
- Search Domain
- Search Engine Manager
- Search Engine Quick Switcher
- Search Engine Security
- Search Engine Sorting
- Search Engine Switcher
- Searchery
- Search Everywhere
- Search Files on Rapidshare Megaupload Mediafire 4shared Easy-Share and Co
- Search Helper - Enhance Google
- Search Highlighter
- Search History with Search Engine
- Search Image by Bing
- Search Image Everywhere
- Search Image with Google
- SearchIMDB
- Search Incognito - Default Search
- Search in HowStuffWorks
- Search in New Tab
- Search IP
- SearchIt
- Search it up!
- Search Keys
- Search Krumo for Drupal
- Search Links
- searchlite - The quickest way to search!
- SearchLock
- Search Lotto
- Search Marker
- SearchMix
- Search On
- Search on Engine Change
- searchOnTab
- Searchonymous
- Search Organizer With Baskets
- Search Plus for Video
- SearchPreview
- SearchRater
- SearchReset
- Search Scrub
- Search Selected
- Search Selected Shortcuts
- Search Selected Text
- Search Selection with SeekIt.gr
- Search Sidebar for Firefox
- Search Site
- Search Slate
- SearchStatus
- Search Synchronizer
- Search Tab
- Search Tabs
- Search term highlighter
- Search Terms in Awesomebar
- Search This On
- SearchThisSite
- Search Thottbot
- Search Thumbs
- SearchTweaker - Super Google & iGoogle!
- Search Videos on GoogleVideo With a Single Click
- SearchWith
- Search With Keywords
- SearchWords
- SearchWP
- Search Youtube
- Search YouTube For This
- search_online_uoj
- SEASR Analytics for Zotero
- Second Search
- SecPassGen
- Secretly Meet - secret messages
- SecretSocial
- Secrets of Firefox
- Secret Word Grabber
- Secure CC
- Secure It
- SecureLink Extension
- Secure Login
- Secure Login (Embedded WebExtension)
- Secure P2P File Transfer (pyGet)
- SecurePassword Generator
- Secure Password Generator
- Secure Password Maker
- Secure Password Maker Flyout
- Secure Sanitizer
- seekR search
- SeekSpeak Sidebar
- Seen Blocker for Facebook™
- Seen Blocker for Google™ Hangouts
- Seen Episodes Tracker
- See on Dictionary.com - Online English Dictionary.
- Seerobots
- Seismic Shaker
- SelBlocks (for Selenium IDE)
- Select-and-Define Google Dictionary Worldwide
- Select2QR
- Select Address Bar
- Select Address Bar Plus - Linux
- Select and search for Amazon
- SelectBoxTools
- Selected Search
- Selected Search Plus
- Selection Links
- SelectionSK Ancient
- selectivecookiedelete
- Selectively Hide Google News
- Select like a Boss
- Select Search
- Select Search Engine
- Select Search Shop
- Select Tabs to Restore
- Select To Search
- Selenium DateUtils
- Selenium Dot Formatter
- Selenium Expert (Selenium IDE)
- Selenium IDE
- Selenium IDE - SelBench
- Selenium IDE: FitNesse Formatters
- Selenium IDE: Flow Control
- Selenium IDE: Implicit Wait
- Selenium IDE: Perl Formatter
- Selenium IDE: PHP Formatters
- Selenium IDE: RobotFramework Formatter
- Selenium IDE: Signature
- Selenium IDE: VBA/VBS Formatters.
- Selenium IDE Ajaxrunner Script Formater
- Selenium IDE Button
- Selenium Wiki Formatter
- Selenium Xebium Formatter
- Selenium XML Formatter
- SeLite Auto Check
- SeLite Clipboard And Indent
- SeLite Exit Confirmation Checker
- SeLite Hands-on GUI
- SeLite Run All Favorites
- Semantic Checker
- Semantic Radar
- Semantic Turkey
- Semantic Web Search
- SemDrops
- Semsy
- SEM Tools
- Send 2 Cellphone
- Send2Prowl
- Send2Sunrise
- Send As SMS
- Send images to Indulgy.com
- Send Mail in Browser
- SendPage
- Send Page By Email
- Sendroid
- Send Tab to Device
- Send Tab URLs
- Send to: Phone
- Send to EidoGo
- Send To Gatherer
- Send to Google Docs
- Send To Kindle by Sabarish VS
- Send to Kindle for Mozilla Firefox
- Send to Mail
- Send To My Cloud
- Send to MyInfo
- Send to Phone
- SendToReader
- Send to xNode
- Send with Spectate
- Senkaimon
- SenSEO
- Sensex Ticker
- Seo&Sem
- SEO & Website Analysis
- SEO, website analysis, website worth calculator
- SEO - The Link Submitter
- Seo4 Toolbar
- SEO Analysis
- SEO Doctor
- SEOHAND
- SEO Info
- SeoLib Toolbar
- SEO Live YSRank - Unique search ranking for any URL
- SEOpen
- SEO Profesional Toolbar
- SeoQuake SEO extension
- SEO Status PageRank/Alexa Toolbar
- SEO Toolbar
- SEOwarp Keyword Rank Checker
- SEO Workers Web Page SEO Analysis Tool
- Separated Values Formatter
- Separate tabs
- Separe
- seppo on tulikettu
- sepsis-console
- sepsis-inspector
- Series Tracker
- SERPTrends SEO Extension
- ServerReplace
- Server Switcher
- ServiceNow Barcode Printer
- Service Now Control - V 1.2
- ServStats
- sesli-sozluk
- Sesli Sözlük Dictionary
- Session Exporter
- Session Fix
- Session History Tree
- Session Keeper
- Session Manager
- SessionPage
- Session Sync
- Set As Bookmarks Toolbar Folder
- setenv
- Set Icon
- setproxy
- Set proxy server with one click!
- Settings Protection
- Set UA to 9
- Sevenyoln Send
- Seznam Settings
- SF0 Monitor
- SFE
- Sfgate Moving Ad Remover
- SFN Menu
- Shaastra Toolbar
- shabdkosh
- ShadGlo Library Toolbar Skin
- ShapeShift Lens
- Share & Free Download 4shared files and Youtube
- Share-Feelings
- Share.to Firefox Plugin
- Shareaholic | share with Google, Facebook and more
- Share Button for Facebook™
- ShareDownloader Remote Extension
- ShareMeNot
- ShareMyLink
- ShareNXS - Capture Images
- Share on So.cl
- Share on Twitter
- SharePa
- Sharepoint Administrator's Toolbar
- ShareTheFiles Menu
- ShareThis
- Share this page
- Share to Google+ Page
- Share Video
- ShareYourPass - A Bugmenot Alternative 1.0
- Sharp Color Picker
- Shazou
- Sheetmusicdirect.com Search Toolbar
- Shelve
- Sherlock Tribute New Tab
- Shift+LeftClick opens links in a new active tab
- Shift+LeftClick XUL
- Shindig Screen Share
- Shiori
- Shiori Helper
- shipofox
- Shippensburg U Theme with Personas Interactive
- Shizerbar
- Shoop.de: Cashback statt Punkte mit LiSA
- Shop2Give
- Shop and Give reminder
- Shop Companion
- ShopDAQ Price Compare
- Shop Down The Debt
- ShopFiller
- Shopkorting Assistent
- shopline
- ShopMasti
- Shopping Baba
- Shopping Bag
- Shopping Helper
- Shopple eGift Rewards Bar
- Shopsailors Plugin for Firefox
- Shopscotch
- Shoptagr
- ShopTalk
- Shoptimate : compare prices automatically
- ShopWiki Form Filler Assistant
- Shopzilla
- ShopZoi : The best Price Comparison App
- ShortcutKey2URL
- Shortcuts for Gmail
- Shortest URL shortener ever
- Shortly URL Shortener
- ShortShip Pro - smart eBay buying tools
- shortText
- shorturl
- Short Url (a.md)
- Short URL Creator with Surl.ME
- Short URL in one click - hsu.su
- Short URL Service by Url.ba
- Short your link - urls - v0v اختصار الروابط
- Shotpix Image Upload
- Show Anchors
- Show Anchors 2
- Show Anchors 4
- Showcase
- Show external css/js files
- Show File Size2
- Show fixed Go
- Show Go!
- Show History Button
- Show Host IP
- Showhow2 – MyTechTracker
- ShowIP
- ShowIP [private]
- Show Keywords
- Show Location
- showmeIP
- Show Me More
- Show MyIP
- Show Password
- Show Password Field
- Show Password On Input
- Show Picture
- Show Screen Captures
- ShowScrollPosition
- Show Selected Images
- Show the Image
- Show WCI Portal Info
- ShrinkThisLink Link Shrinker
- Shrtl (goo.gl)
- Shrunked Image Resizer
- SiaC - Share-in-a-Click
- sidebarclose
- Sidebar Icons
- sidebar makeup
- Sidebar on Right
- sidebaropen
- Sidebar Tabs
- SideTabby
- Side Tabs
- Side Watch
- Siena College Theme with Personas Interactive
- Siepomaga
- Sifrei Kodesh Search
- SIGAA Fácil
- Siga Helper
- SigBake Menu
- SigBuzz Email Signature Marketing (Gmail & G Apps)
- Signature
- Signature /Auto Paste /Prefill Fourms
- SignatureCheck.org Certificate Thumbprint Validator
- SignNow
- signTextJS
- Sign That Sis!
- Signup Block
- SignupShield Passwords
- Silent Block
- SilveOS.com
- SilveOS Firefox addon
- SIMFox
- Similar Pages
- Similarsitecheck plugin
- Similar Sites - Discover Related Websites
- Similar Sites Toolbar
- SimilarWeb - Website Traffic Sources and Ranking
- Simple-Calculator
- Simple Amazon DE Search Button - Einfach suchen
- Simple bookmarks menu
- Simple Currency Converter
- SimpleDelicious
- Simple Hinting
- Simple Image Blocker
- Simple Keywords
- Simple Links Counter
- SimpleMachines Notifier
- Simple Mail
- Simpleology Browser Add-on
- simplepinboardbutton: lightweight pinboard add-on
- Simple Pomodoro
- Simple RSS Reader (SRR)
- SimpleSort Bookmarks
- Simplest-Image-Hosting.net Quick Upload
- Simple Text Editor
- SimpleTranslate
- simpleTranslator
- Simple Translator
- simpletweet
- Simple URL flipper
- Simple Youtube HTML5 Video Player
- Simple YouTube to MP3/MP4 Converter and Downloader
- Simplify Awesome Bar
- Simpl URL Shortener
- Simply Pinned
- SimplySecure-Facebook
- Simply TabCopy
- Sina Microblog Weaver
- Singapore-newspapers
- SingapuRate Website Filtering Service
- Singing Stallman
- Single Key Tab Switch
- Single Sign-on Assistant
- Singlish to Sinhalese
- Sinhala Converter
- SinhalaKey
- sinhala Tamil type (unicode)
- sipgateFFX for Firefox and Thunderbird
- Siphon - Add-on Synchronizer
- Sirex's App Tabloc
- Sit-Upright
- Sitebar Client for Firefox 4.0.x
- Site Blindado Alerts
- SiteCheck extension for Firefox
- SiteDelta
- Site events informer
- Site Identity Button Colors
- Site Info Buttons
- Site Information Tool
- Sitejabber: Ratings & Reviews on Every Site
- SiteLauncher
- Sitelogr.com Quick Reports
- SiteMetrics SEO for Firefox
- Sitenable
- Site navigation bar
- Site Preferences
- SiteSays
- Site Scout
- Site Search
- Site Searcher
- SiteTalk CashBack Add-on
- Site to Phone
- SiteTrail
- Siteworth.info
- SixOrNot
- Sixsense Toolbar
- Six Sigma Calculator
- SJCall
- SJL's Flickr Saver
- SJL's URL shortener
- SJW to Liberal
- SKdownloader
- Skeedz NewTab
- Skeptical Science
- Sketcher
- Skills for Twitter
- Skinny Mom Theme with Personas Interactive
- Skip Addon Compatibility Check
- Skip adf.ly skip!!
- Skip Cert Error
- Skip Feedsportal
- skipgoog
- Skip Like And Go To YouTube
- skippd
- SkipScreen -- download helper, now for sale...
- SkliQ Screen Sharing
- Skylink Screensharing mdxcess
- Skynet
- Skype Smileys for Facebook chat
- Slackware package search bar
- Slager on Air!
- Slashy
- Slavehack Toolbar
- SlideshowPlayer
- Slide Show Viewer
- SlightlyEnhancedViewImage
- Slikice.info
- Slim Add-ons Manager
- SlimSearch
- Slimserver Control
- slingalink
- Slogger
- Slow Startup Logging
- SLT Broadband Meter
- SlyFox
- SlyZoom
- sm115
- Small Clock
- Smaller Tooltip
- Small Firewall
- Small Screen Renderer
- Small Tooltip
- SmallURL
- Smarky
- Smart-IP Connection Info
- Smart Ads Blocker
- Smart A Lot
- Smart Bookmarks Bar
- SmartClick
- Smart Digg Button
- SmartFill
- Smart Find
- Smart location (smart text)
- SmartPager
- SmartPrint
- Smart Referer
- Smart Refresh Button
- SmartSearch
- Smart Tooltip
- SmartVideo For YouTube
- SmartWhois Launcher
- sMashinoy Notify
- SME BLOG Menu
- smftn
- SMF Watcher
- Smiley Pack for DesiDime
- SmileySidebar
- Smith College Theme with Personas Interactive
- Smokin Joes TT v1
- SMS-Truba
- SMS4buddy
- SMSalias MozClient
- SMSBOX Toolbar
- smsflatrate.net SMS
- SMS Sidebar
- SMS Tracker
- SmugManager
- Snagit Autoscroll Helper
- Snake
- SnapBack
- Snapbugz
- Snapdeal Toolbar
- SnapE Screensharing Helper
- SNAPforSeniors Toolbar
- Snapicate
- Snap Links
- Snap Links Plus
- Snapper
- SneakPeek
- Snip-n-Tag
- Snip It! Button for eBay
- Sniply - Drive Conversion Through Content
- SnipR
- Snipshot
- SNL News
- SNPTips
- SnuggleCloud
- SOA Client
- SoAmpli
- SoapBox
- Soapy
- socat
- Social-Deal.de Reminder
- Socialbrowse
- Social Fixer
- Social Friend Finder (SFF)
- Socialite
- Socialize extension for Firefox
- Socializer! for Firefox
- Social Media for Firefox
- SocialMediaTXT
- Social NCCU
- Social Network Commented Photos
- Social Networking Links
- Social Network Liked Photos
- Social Network Tagged Photos
- Social Permissions
- Socialphile
- Social Share Counts
- Social whale extension
- SocietyLive
- Socioner
- Soda PDF Online Services
- Softpedia Linux
- Softwareprofit Stats
- Sokoban.WS Tools
- Solar Flare Alert!
- Solera Universal Connector
- Solfyre-ID
- Solinet AdsSpy
- Solitaire/Pasjans
- Soliya Screensharing Extension
- Solpets Quick Button
- SolusVM VPS Monitor
- Solve as Puzzle
- Song.ly
- Sonoma State U Theme with Personas Interactive
- SOPA Detector 0.0.1
- Sort By Name Tweak
- SortFix Search Extension
- Sort My Downloads
- Sort Tabs
- Sort Tabs Command
- Sothink Web Video Downloader for Firefox
- Soul-Boards Skin Add-on
- SoundCloud Player
- SoundCloud Sounds in Google Mail™
- SoundLogin
- sourberry
- Sourberry Notifier
- source code of a webpage
- source code view
- SourceEditor
- Sourceforge Direct Download
- Source Viewer Tab
- Sour Spoiler Hater
- South-Korea-newspapers
- South African English spell checker
- Southern Nazarene U with Personas Interactive
- Sozlook
- Sozzluk.com
- Spacebar Bounce
- SpaceGhetto / Imagehut / Picrandom Picture Rehost
- Space Next
- spadsms
- Spain-newspapers
- Spam Control
- Spam Fire
- SpamReport
- Spanish (Spain) ChatZilla
- SpanishTrans
- Spann Reminder
- Sparkbox Websnap
- Sparmelder powered by MeinAnteil.de
- SpeakingFox
- Speak It
- Special Order
- Spectator
- Speechify
- SpeechUtil
- Speed Dial
- Speed Dial [FVD] New Tab Page, 3D Start Page, Sync
- Speed DNS
- SpeedLedger
- Speed Scrabble Notifier
- SpeedTao Download Helper
- Speedtile
- SpeedView
- Speedy Readie
- SpellBound
- Spell Checker
- Spell Checker Improved - Firefox 4 Compatible !
- SpellcheckEverything
- Spell Tab
- Spiceworks Toolbar
- SpiderPic
- Spiders Helperli
- SpiderZilla
- Spillo extension
- SpinSpotter Spinoculars
- Spiritling Toolbar
- Splash!
- Splash! (Compatibility Update)
- Splash! (Compatible version of Firefox 4)
- Split Pannel
- Split Test Calculator
- Spoiler Spoiler
- SPOJ Getter
- SpojRandom
- SPOJ Rank Tracker Beta
- Spoofee Toolbar
- Spoof FxOS
- spoonacular recipe saver
- SporeScope
- Sportingbet Bulgarian
- Sportingbet Hungarian
- Sportingbet Russian
- SportsFox
- Spotify for VK
- SpotifyIt
- Spotify Search
- spotify_hotkeys
- Spotlight
- Spreadsheet Calculator
- SproutCore PathPicker
- SPUG Forums Menu
- SQL Cardfile
- SQL Injection
- SQL Inject Me
- SQLite Manager
- Squared Australis Tabs
- Squidoo
- Squidoo DE
- SquiggleSR
- SRKiosk
- SS Ancestry Quick Button
- SSL Button
- SSleuth
- SSLGuard
- SSLPasswdWarning
- SSLPersonas
- SSL Proxy
- sslvis
- st-videoconferencing
- St. John Fisher College with Personas Interactive
- St. Louis The Point 105.7 - Alternative Radio
- St. Patricks Day Interactive Theme
- STAB
- Stache (Visual Bookmarking)
- Stack Alert
- Stacked Inspector
- StackInbox for Firefox
- Stack Manager
- StackOverflow Bar
- StackOverflowiser
- Stack Overflow reputation display
- StackOverflow Trilogy site bar.
- Stack Style Tabs
- Star-Button In Urlbar [Fx 45-56]
- Star2Star Browser Extension
- Star Kingdoms Kit
- Starry Sky Theme Wallpaper Tab
- Startlap Eszköztár
- StartupMaster
- Startuptabs
- Stat-o-matic
- Stateless
- Statistiques Boxson
- StatShow - Free Website Worth Estimator
- Status-4-Evar
- Status-bar Calculator
- Statusable
- Status Bar: Compact & Dynamic
- Statusbar Clock
- StatusbarEx
- StatusBars
- Status Box
- Status Buttons
- Statusdate
- Statusus
- Stay-Open Menu
- Stay Connected With Nexxoss
- StealEngine Search Addon
- Stealther
- StealthMarks
- Stealthy
- Steam Database
- Steam History
- Steam Linkfilter Bypass
- Steam Link Filter Bypasser
- Steam linkfilter bypasser
- Steam Market - Favorite Items
- Steam Powered Forums Browser Updated
- SteamRep Checker
- Step.to URL Shortener
- steplog
- Stereo Image View Converter
- Stevecast Updater 1.1
- Stevedore
- stf
- Sticklet
- Sticky Fields
- Sticky Notes
- StickyThis Toolbar
- StockFox
- StockTicker
- StockTwits Firefox Extension
- Stock Viewer
- StOgame - Standard Ogame Project
- Stooorage.com Upload
- STOP! Hammertime!
- Stop-it
- Stop-or-Reload Button
- Stop Internet Censorship!
- STOP in the name of love!
- Stop it!
- Stop Mod Reposts
- Stoppity Poppity
- Stop Redirect Gmail Splash Page
- Stop SOPA
- Stop Tony Meow
- Stop Tube HTML5
- Stopwatch
- Stop YouTube Autoplay
- Storage Inspector
- Stored Variables (Selenium IDE)
- storeTab
- Storie Web Clipper
- StormFiles
- StoryPassers StoryBar
- StrataBuddy
- Stratiform
- Streamfully
- Streetmap
- StretchClock Break Reminder - Desk Yoga
- Strict Compatibility Opt-in Test Addon
- Strict Pop-up Blocker
- Strict SSL3 Configuration
- Strict Transport Security - Detector
- Strokes
- StrongBad Emails: Prev and Next
- Strum Strip
- STRX
- STS Timer
- StubHub Preview
- Study English everyday
- Stuff It Beta by LiveStuff, Inc.
- StumbleUpon
- Style Editor
- Style Sheet Chooser II
- StyleSheet Chooser Plus
- Styles Tuner
- Stylish - Custom themes for any website
- Stylish Sync
- Stylus
- Subasa Tamil to Sinhala Transliteration
- SubFox
- SubITAnime Notifier
- Submit 'em now
- Submit to Blogmemes
- SubmitToTab
- Submit Word (Romanian)
- Subscene.com Search
- Subscriberinfo
- Subscribe to feed
- Subtile
- Subtitle Matcher
- Subtitles Search Toolbar - SToolbar
- Subtitles Timeline
- sudoku
- Sudoku Helper
- Sugarland - Official Theme and Extension
- Sugestron Speed Dial
- Suggest Me
- SuggestThemAll!
- Suggy Addon
- Suicide Girls Downloader
- Sum it Up
- SummaryFox
- SummerCSS
- SUNBIRD Button-**32** bit version-for Firefox 4.* and Thunderbird 3.*
- SUNBIRD Calendar button- **64 bit** version for Firefox 4.* and Thunderbird 3.*
- Sun Cult
- Suomi Sanakirja
- Super App
- superbar
- Super DragAndGo
- Supergirl Theme Wallpaper Tab
- Superglue
- Super iGoogle.
- SuperOTR Extension
- SuperPages
- Super Paste!
- superpricecomparison
- Supersavingsfinder Toolbar
- Super Start
- SuperSwitch
- Super Tab Mode
- Super User Agent
- superUserContent
- Super Video Downloader / Youtube Downloader
- SupportGeenie.Com | Enable Screen Sharing Option
- Suppress Homepage
- SurfBook
- Surfedia Drag & Drop Bookmarks
- SurfKeys
- Surfmark - screenshot webpage capture & annotate
- Surfon
- surf Screen Capturing
- Suricate
- sustainable-seafood
- SVG Snapshot Button
- SVN Branch Manager
- Swaglr
- Swanalekha
- Swap.com - SwapShopper
- Swap Proxy
- SWAT Page Capture Tool
- Sweden-Newspapers
- Swee Chat
- SWG Assistant
- swich to closet
- SwiffOut Fullscreen Games
- Swift Selection Search
- Swipe Navigation
- Swipe Tabs
- switch-to-tab Blacklist
- switchasitype
- Switch Google Instant
- SwitchHosts
- Switch Message Colour
- Switch plugins.click_to_play
- switchproxytype
- Switch to Tab no more
- Switch Window Mode
- Switchy
- Switzerland-newspapers
- SW Minnesota State U with Personas Interactive
- SwU : Fast url shortener !
- Sylestia: Hatchlings As Adults
- Symbaloo Bookmarker
- Symbolab Quick Search
- Synapse Capture Tool
- SynchdUp
- Synchronicity
- Synesthesia simulator
- SynoExt
- SynoExt Torrents
- SynoLoader
- synopse,
- Syracuse University Athletics Interactive Theme
- System Monitor
- System Video
- Szekely-Magyar Rovas (Szekler-Hungarian Rovas)
- Sztakidict SZTAKI Szótár a középsõ ujjban
- Símaskrá
- Sök på Tradera
- Sözlük(te)* Online Dictionary
- t-online.de Top-Themen
- T-Suggest
- Taalnu
- tab-counter
- TabAlarm
- Tab Auto Reload
- TabAway
- tab backup
- Tab Badge
- Tabbed View Source
- Tabbrowser Preferences
- Tab buttons
- Tabby
- Tabby2
- Tab Catalog
- TabClearSearch3
- Tab Clicking Options
- TabCloser
- TabCloud
- TabCollector
- Tab Colors
- TabCorral
- TabCount
- TabCounter
- Tab Counter
- Tab Crasher
- Tab Cycler
- Tab Data (+Memory usage)
- Tab delabelifier
- Tab Deque
- Tab Effect
- TabFind
- TabFlasher
- Tab Flick
- Tab Focus
- Tab Grenade
- Tab Group Bar
- Tab Groups Button
- TabGroups Manager
- TabGroups Menu
- Tab Group Switch Command
- Tab History
- TabHistory
- Tab History Menu
- Tabhunter
- TabIMSwitch
- Tabinta
- Tab Killer
- Tab Kit
- tabkit
- Tab Kit 2nd Edition
- TabLang
- table calculator
- Table Filter
- tableScrapper
- TableTools2 - Copy/Sort/Chart/Filter Table&More!
- TabLimit
- tablimiter
- Tab Lister
- Tabloc
- Tab Memory Usage
- Tab Merger
- Tab Minus
- Tab Mix Plus
- tab modal prompt
- TabMyPosition!
- TabNavigator
- TabNavIt
- TabNavIt Reversed
- Tab notifier
- Tab No X
- Taboo
- Tab Overflow @ps
- Tab Permissions
- Tab Popup
- Tab Preview
- Tab Prophet
- TabRenamizer
- Tab Replace
- Tab Restore
- Tab Rotator
- tabs2list
- Tabs Always In Titlebar
- Tab Saver!
- tabs closebutton restored
- Tab Scope
- Tabs Counter
- Tab select saver
- Tabsflip
- Tabs From Other Devices Button
- TabSlide
- Tab Slideshow
- tabsmack
- Tabs Menu
- Tabs on top
- Tabs Open Relative
- Tabs Open Relative (Modified)
- Tabsplash
- Tab Splitter
- TabsRight
- Tab Statistics
- Tab Store
- TabSubmit
- TabsUp Homepage Manager
- Tabsurd
- Tab Swap
- Tab Sweeper
- Tab Toggle
- tabTooltip
- Tab To Window
- TabTrekker - New Tab Page
- Tabulous
- Tabundle
- Tab URL Copier
- Tab Usage
- Tab Utilities
- Tab Utilities Fixed
- Tab Utilities Lite
- Tab Utilities Lite CE
- Tab Utilities Locales
- Tab Wheel Scroll
- Tabwrangler
- Tab X
- Tacotab
- Tadpole Code
- TADSEE
- Tag Editor
- Taggee
- Tagger
- TaggingNotes
- Taggly
- Tagific
- tagin
- tagin!
- TagMan Testing Add-on
- Tagmarks
- Tagmarks Modifier
- Tagore Quotes
- Tags Everywhere
- TagSieve
- TagSifter
- TagSpaces Web Clipper
- TagsSidebar
- Tagu
- Tails Export
- Tailwind Publisher
- take me to this url
- Take Screenshots, Screen Grab with Online Upload
- Talky.io WebRTC Videochat
- Talladega Superspeedway Interactive Theme
- Tamil fonts package
- Tamil to Sinhala Transliteration
- TamilVisai (TamilKey)
- Tamil Youtube Video Download
- Tamper Data
- Tamper Data Icon Redux
- Tanach Linkify
- Tangerinefox Extras
- Tangofox Extras
- Taobao quick search
- Tao Bao Wang Wang
- TapTack
- Tapuz Hacks
- Tapuzon
- Target.com - context Menu Search
- Targeted Advertising Cookie Opt-Out (TACO)
- TargetKiller
- Taringa HoverCard User Profile
- Tark (Temporary Bookmarks)
- Task Information Collections
- Tassimo T-Disc Deals
- TastyGoogleReader
- TatkalNow for IRCTC
- TAW3 with a click
- TE/FE ToolBar
- TeaBiscuit
- TeamFM Extension
- TeamFound
- Team Liquid Streams
- Teamportal
- Tea Timer
- Tecaj
- techblocker
- Techblog Toolbar
- Techmeme Less
- Technician Parts Highlight Search
- Technika
- Technion Moodle Connector
- Techopedia.com Dictionary Search
- TechTalkz ForumNavigator
- TeddyID Password Manager
- TED the Toolbar
- tektek.org GaiaOnline Toolbar 2.1
- Telegram Fox
- Telehealth Screen Sharing 1
- Telescope - Galaxytool
- Telify
- Tellurium IDE
- Tellurium UI Module Plugin (Trump)
- TellyFit
- Telugu fonts package
- Telugu Video Download
- Temple University Interactive Theme
- Tenon Check
- Tere Euro!
- termBlaster
- TerminalRun
- Terms of Service; Didn’t Read
- test-automation-password-manager
- Test4Theory Stats Checker
- Testability ids!
- Test and Target Interface Fixer
- TestGen4Web
- TestingAddON
- Test language keywords
- Test Results (Selenium IDE)
- testScreen Sharing
- Test Suite Batch Converter (Selenium IDE)
- TestWise Recorder
- Tetherly addon
- teutoRADIO
- Texas A&M International U w/ Personas Interactive
- Texas State University Interactive Theme
- TexFlame
- Text-to-Image
- Text-to-Speech (Google™ & HTML5)
- text/plain
- Text2Link
- Textarea Selection Search
- Text Block Zoom
- Text Complete
- Text Formating Toolbar + Single Click downloader
- Text Formatting Toolbar
- Text Holder
- Textise
- Text Link
- TextMarker!
- TextMarker Go
- Textme
- Text MultiCopy
- Texto
- TextR.Us AutoSMS
- Text Rewriter
- Textsaver
- Text Shadow
- Text size toolbar
- TextToTag
- Text to Voice
- texyfox
- TeXZilla
- TF2OP Alert!
- TFS Colorizer
- Thaana fonts package
- ThaiSEObar
- Thai Words Separator
- The Beatles Tribute New Tab
- The Big Gift List
- The Browser Highlighter
- The Camelizer - Price Tracker
- theCHIVE
- The Citadel Theme with Personas Interactive
- The College of Saint Rose w/ Personas Interactive
- The easiest Xdebug
- The Fort Bar
- TheFreeDictionary.com Lookup
- The Game Numbers
- The Green Web
- The Grim Tab Reaper
- The Huffington Post HuffPo Interactive Theme
- The Idle Login
- The Interrobanger
- The Irregular and Phrasal Verbs
- TheLab Forum Menu
- The Mane Street Forums Menu
- Themed Button for Linux
- Theme Font & Size Changer
- Theme Font & Size Changer (fixed)
- ThemesLtd
- Theme Test
- The Middle Mouse Button
- The Moneyer Synchronization addon
- The Moscow Times Toolbar
- The Most Unnecessary Firefox Add-on V 1.0
- The Movie Database (TMDb) Search
- The Music Hutch Toolbar
- The NCCAA Theme with Personas Interactive
- The Next Web
- The Night Owl
- The Official 2011 ICC Cricket World Cup Add-on
- The Official Baseball Add-on for Firefox
- The Official Basketball Add-on for Firefox
- The Official BlogTV Toolbar
- The Official Chayanne Add-on for Firefox
- The Official Chelsea Football Club Add-on for Firefox
- The Official Christmas Holiday Add-on for Firefox
- The Official Diego Torres Add-on for Firefox
- The Official eMusic Toolbar
- The Official Enrique Iglesias Add-on for Firefox
- The Official FC Spartak Moscow Add-on for Firefox
- The Official Football Add-on for Firefox
- The Official IZOD Indycar Series Add-on for Firefox
- The Official Juanes Music Add-on for Firefox
- The Official Liverpool F.C. Add-on for Firefox
- The Official Liverpool FC Toolbar
- The Official Marc Anthony Add-on for Firefox
- The Official MLB.com Toolbar
- The Official Nelly Furtado Add-on for Firefox
- The Official NHL Toolbar
- The Official Oxfam International Toolbar
- The Official Real Madrid Club de Futbol Toolbar
- The Official Soccer Add-on for Firefox
- The Official The Saturdays Add-on for Firefox
- The Official Topix Toolbar
- The Official Tottenham Hotspur F.C. Add-on for Firefox
- The Official Univision.com Toolbar
- The Official USA Add-on for Firefox
- The Old Reader Bookmark
- The Pirate Bay Forwarder
- The Pirate Beacon
- ThePrimalKingdom
- TheRealURL
- TheResponsiveCV
- The RuneHQ Browser Bar
- The Saloon Bar
- The Saloon Bar
- Thesaurus: Synonyms and Antonyms
- The Sea App
- The Shopping Toolbar for eBay
- The Ultimate Free Stock Photo Search Tool
- The Web Genome Project
- theWebMind Generator
- The Wireless Registry - Wireless Around Me
- Thin Bookmarks
- Thing Fling Status Checker
- ThinkAhead
- Think Digit Toolbar
- ThinkFree Viewer
- Thinkful Screen Sharing
- THINK PRO LMS
- Thin Tabs
- Thin Xdebug
- thisDotGoogle
- This is not a search engine
- Threaddit (thread tool for reddit.com)
- Throbber Button
- Throbber Changer
- Throbber Restored
- ThumbnailCopy
- Thumbnail Expander
- Thumbnail Zoom
- Thumbnail Zoom Plus
- Thumbs
- ThumbsDown
- ThumbStrips
- Thunderbird Biff
- ThunderLinkSpotter
- ThunderTranslator: Thai-English instant translator
- tianya bbs tools
- Tianya Forum Assistant
- Tibia Online Status
- Tibia Search
- TickerTocker Screen-sharing Extension
- Ticker Tool
- tickety-tick
- TickTick
- TiddlyFox extension for Firefox
- Tidy Browser Button
- Tidy Favorites
- Tidy Favorites Online
- TidyFox - Fast Access to Your Sites!
- Tidy Meebo
- TidyRead
- Tile Tabs
- Tile View
- Tilt 3D
- time-tools-zh
- Timeger
- Time Keeper
- TimeLapse for Firefox
- Time Limiter
- Timeline Sidebar
- Timer
- Timer123XYZ
- Timer Fire
- TimerFox
- Time Shift
- Time Signal
- Timestamp
- TimeStamp Converter
- TimestampDecode
- TimeTracker
- TimeZone
- Timezone Converter by WM-tool.com
- Tinapols Link Finder
- Tinderstatus
- TinEye Commercial API Search
- TinEye Reverse Image Search
- Tinfoil
- Tiny.pl
- TinyThatURL
- TinyTweet
- TinyUrl Creator
- TinyURL Generator
- TIPISH! Uploader
- Tippy
- Title Bar Tweaker
- Titlebar Tweaks
- TitleCase
- TitleQ
- Title Save
- TiVo Community Forums Menu
- Tixeo Web conferencing Extension for Firefox
- TiX Now!
- TJ Quick Search Toolbar
- TJ SEO RANK
- TKIEE Screensharing Extension
- TL;DR-ify
- tli.tl shorten your links
- TMDA Address Generator
- tmh
- tmnt
- TMZ Celebrity Gossip & Entertainment News
- to.ly- URL shortener
- To / From Amharic
- Toast Notification Alerter Add-on for Windows 8
- Toby Keith Bar
- Todoist: To-Do list and Task Manager
- Tofler It!
- Together with Foxkeh
- Together with Gikoneko
- toggle Console
- Toggle Cookies
- Toggle Development Profile Prefs
- Toggle Document Colors
- ToggleDocumentColors_
- Toggle Document Fonts
- Toggle Find Bar
- Toggle Javascript
- Toggle Paint Flashing
- Toggle Personal Toolbar
- Toggle Private Browsing
- Toggle Proxy
- toggle Responsive
- Toggle Search
- Toggle Tabs Timer
- Toggle Word Wrap
- Togglify Add-on Toggler
- Tohoku Epco Checker
- TokBox Voice and Video Calls
- toktogi
- Tokyo Ghoul New Tab Theme
- Tomato Box (Beta)
- Tombol Balas Komentar
- Tomfox
- Tomfox+
- Tom Green Live!
- Tomorrowww
- TonidoFox
- Toodledo
- Toolbar: Tippfehler bei eBay finden
- Toolbar Blog Ri32
- Toolbar Button for Facebook™
- Toolbar Buttons
- Toolbar IndoBM
- Toolbar Link Website FKIP UNS
- toolbarmode
- ToolbarMS (The MySpace Toolbar)
- Tool for Google disavow backlinks tool!
- Tools > Options… for Linux
- Tools Menu Button
- Tools Menu Organiser
- Tools Sidebar
- TooltipKaskus
- Tooltip Plus
- TooManyTabs - Saves Your Memory
- Toontown Rewritten Invasion Notifier
- Top-gutscheincode.de
- Top 10 Albums
- Top 1000 - Easily navigate top sites
- Topline Bookmark
- TopRacers F1 Manager
- TopSite - Find Top Sites
- Tor-Proxy.NET Toolbar
- toread
- TorrentBar
- Torrent Finder Toolbar
- Torrent it easy
- Torrent leech quick download
- Torrent Server Handler
- Torrent Status Tool
- Torrent Tornado
- Torrix
- TortoiseSVN Menu
- To Scan (Tunisia-Sat Forums)
- Total Defense Traffic Light
- TotalRecall
- Total ReChrome
- TotalSpoof
- Touch Enabler
- ToutApp
- Tower Ghost for Destiny
- Tozoy Share
- TPB->Proxy Link Convertor
- Trace Metrics
- Tracey
- Tracker
- TrackerBlock
- Track Link
- TrackMeNot
- Track Package
- TrackThis
- TrackTime Helper
- Track your shipment
- Traction Control
- TradeMe Toolbar
- traduku
- Tradutor
- Traffic Codex Promo Code Finder
- Traffic in Istanbul
- trails
- Tranquility Reader
- Trans-IT
- trans2Sinhala
- Transfer Assistance
- Transformice Ultra Fullscreen
- transformMPG
- translateGe
- Translater Algo
- Translate This!
- Translate to Korean
- Translation Panel
- translator (fixed)
- translator-to-zh
- Translator to english
- Translatyk
- Transliterate
- Transliterate Cyrillic Tajik/Persian
- Transliterate Kurdish
- Transliterate Russian Cyrillic
- Transliterate Ukrainian Cyrillic
- Transliterator
- Transmaker
- Transmogrify for Plex
- Transparent standalone images
- TransportBug
- TrashMail.com for Mozilla Firefox®
- Travel VisaHQ Widget
- Travian Report Helper
- TravianTacticsBot
- TreeHouseTools
- Tree Style Tab
- Trello Card Counter
- Trello Card Numbers
- Trello Improvements
- TrendScape
- TrExMa
- Trexy TrailBar
- Trialfire
- triallink
- Tribal Wars Assistant
- Tribal Wars Distance Calculator
- Tribal Wars Map Assistant
- Tribal Wars Menubar
- Tricky Frames
- TriggerBar
- Trimbly
- TrioSearch
- TripleSync
- TRM_MinFont
- Troll Faces for Facebook Chat
- Trolling Extension
- Trololo
- Trololololo Man
- Troy University Theme with Personas Interactive
- Trudnoca.net
- Trueblock Plus
- TruePythonistaAntiRuby
- True Whois Lookup
- Truly Bulgarian Google.bg
- Trump Tweets New Tab Theme
- TrustAuth
- Trusted Linker Download Redirect (TLDR) Support
- Trusted Shops extension for Firefox
- TrustedSource Category viewer
- TRUSTe Tracker Protection Beta
- Trust My Web
- TrustWatch Search by GeoTrust
- Trustwave SecureBrowsing
- truth.ee
- TryAgain
- TSG Navigator
- TSKeyboard
- TS server info
- ttfc-google image search modifier
- TTFC - Share-cash Survey Bypasser
- TTFC Docked Facebook Timeline
- TTS for Linux
- Tubecheck
- Tubegraph
- Tube helper
- TubeTools
- TUCaN't
- TUEBL Ad Remover
- tuit.in URL shortener
- Tulum Expertizer!
- Tumbarumba
- Tumblr
- tumblr-unrecommend
- Tumblr Audio/Video player volume slider
- Tumblr Hi-Res
- TumblrMSG
- Tumblr Post
- TumblrPro
- Tumblr Savior
- Tumblr Scrollr (beta)
- TuneTune - YouTube to MP3
- Tunisia-Sat Plus
- Turanslit
- TurboCall
- Turkcelestir
- Turkey-newspapers
- Turkish Deasciifier
- Turn Off the Lights for YouTube™ and Beyond
- TuyMove Emoticon
- Tuzek.com
- TV-FOX - Watch TV Online
- tv-guide
- TV-lanD Player
- TV-replay
- TVapex Screen Sharing
- tvgidsgcal
- Tv program
- TVSurfTV
- TweakMDB - IMDB Video Downloader & More
- Tweak Network
- TweakScene Home
- TweakTube - YouTube Enhancer / Video Downloader
- Tweecious
- Tweet-hider
- Tweetbeat Firsthand
- Tweet Context
- Tweetlight
- Tweet Line
- TweetSave
- TweetStalk
- Tweet That!
- TweetTheme / Twitter Interactive Theme
- tweez
- Twiference Sidebar
- TwiiBook
- TwinkleFox
- TwiTango
- Twitch+Tags
- Twitch Disable Unfollow
- Twitch Fox
- Twitch Live
- Twitch Tracker
- twithide
- TwitKit
- TwitKit+
- TwitrPix Express for Firefox
- TwittagFox
- twitter-expand
- Twitter Address Bar Search
- Twitter Backgrounds
- Twitter Block Chain
- Twitter Bootstrap 3 Helper
- Twitter Counter (BETA)
- Twitter Disconnect
- twitter Extention
- Twitter Firefox Toolbar - TwitBar
- Twitter Link Expander
- Twitter Media Preview
- Twitter Remove Non-Followers
- Twitter RTL
- Twitter Side Switcher
- Twitter Super Tweet
- Twitter Symbols
- Twitter ToolBar
- TwitterTweetFilter
- TwitThat
- TwittyTunes
- Twobble - Twitter share links for Facebook
- txtWeb emulator
- TYC + PR indicator
- tyottoURL
- TypeGauge
- TypeScript Playground
- Type The Web
- Typing Speed
- Typing Stats
- TYPO3 Backend
- TYPO3 Workbench
- Typo Correct
- Typograf
- Tzell FindIt
- Türkçe Kur'an-ı Kerim Meali
- U-Plas
- U.S.T.A. Dolandırıcılık Engelleme Eklentisi
- U2M URL Shortener
- ua-site-switch
- UAControl
- UAE-newspapers
- ualoo Image Uploader
- UberNote Toolbar
- Ubersearch Bar
- Ubiquity
- Ubiquity in Awesomebar
- uBlock mobile
- uBlock Origin
- UBL Used Book Tracking Manager
- Ubuntistas menu
- ubuntu-countdown
- Ubuntu-CZ Menu
- ubuntu-forum-tr
- Ubuntu-hu menübár.
- Ubuntu-it Menu
- Ubuntu Forums Menu
- ubuntuusers Menu
- Ubuntu VE
- uc
- ucan-addon-translator
- UCB-Panel
- UCLA Automated Login
- UC Libraries Research Toolbar
- UComment
- UE4 Github Doc Links
- UF comment board tools
- uggc protocol
- uHide
- UI Eraser
- UI Fixer
- UINstatus
- UI Text Overrider
- UI Tweaker (Formerly Toolbar Cleanup)
- UI Tweaker updated For Firefox 3.6 and below.
- UK-Homepage
- UK-Newspapers
- Ukraine-newspapers
- UK Threat Level
- UK TV Guide and Search
- ul.timate.info
- UL Monroe Theme with Personas Interactive
- ULPS
- Ultimate Flash Killer
- UltimateFullscreen
- Ultimate Pricechecker
- Ultimate SMS API
- Ultimate Spotify Search
- UltraFM
- ULTubE - Ultra Leeching YouTube Engine
- UMass Lowell Theme with Personas Interactive
- Umaxlogin Stats Lite
- Umbraco Debug
- Umbraco Debug (Firefox 3.6)
- UMES Interactive Theme
- Un-StartSSL-ify
- Unbeatable Bar
- Unblock afr paywall
- Unblock Youku
- UNC Libraries redirector
- Undo Closed Tab
- Undo Closed Tabs Button
- Undo Close Tab Replacement
- Undo Tab @ps
- Undo Tab Operations
- Unflag Addon on AMO
- Unfocus
- unframe
- UnHide fields
- Unhide Menubar
- Unhosted Mail
- UNIAN news
- Unicode Input Tool/Converter
- UnicodetoHTML
- UniconifyPlaces
- Unified Search
- Unified Sidebar
- Unimerc - Amazon Price Tracker
- union v1
- UniPass
- Unique Link Names
- Uniten Toolbar
- Unityfox
- Universal Behavioral Advertising Opt-out
- Universal Edit Button
- Universal Print
- Universal Search & IE 8 Accelerator
- Universe Wars Extension
- Universidad Fermín Toro
- University of Calgary Theme w/Personas Interactive
- University of Cincinnati Bearcats - Official Theme
- University of Indianapolis w/ Personas Interactive
- University of Massachusetts Interactive Theme
- University of Notre Dame Irish Interactive Theme
- University of Vermont Theme w/Personas Interactive
- Univie Course Catalogue Exporter
- Unix manpages do-the-thing
- UnloadTab
- Unmask
- UnMHT
- Unofficial cloudho uploader
- Unofficial eMusic Toolbar
- Unofficial Myspace Toolbar
- uNote
- UnPlug
- unProtector
- Unread Gmail Favicon
- Unread Tabs
- Unscript-ml
- Unsearched
- Unseen
- Unshorten.It!
- Unsocialize: The Link Unsocializer
- UnsocialReader
- Unsticker Me
- Untamed Now Playing Resurrection
- Untitled
- Unvisit
- Unwrap Text
- Unycare Screen Sharing
- UOL Jogos Enhancer
- uPassword
- Update Bookmark
- Updated Ad Blocker for Firefox 11+
- Update Notifier
- Update Scanner
- UPIT.NO
- Upit right-click
- UploadMe - Right Click Upload
- UploadPie Uploader
- UploadProgress
- Uploadr for Flickr
- Upload to Firedrive
- Upload to imgxc
- UPPERSAFE
- Uppity
- uppix right-click
- Upscrn Uploader
- Ur.coach Enable Screen Capture
- Urban3p toolbar
- Urdu Bar: Write Urdu on WebPages
- Urim
- URimage.net - Free Image Hosting
- Urimal Doumi (Korean Advisor)
- Urimod
- URL&p
- url-addon-bar
- URL/Address Bar Font Bigger
- Url2Link
- url2pdf
- URL2Titlebar
- URL Alias
- UrlbarExt
- Urlbar Search Fix
- UrlbarToSearchbar
- URL Buttons Pack
- urlCheck.info - Malware & Phishing-Site Detector
- Url Checker - Check link - Download links Checker
- UrlCorrector
- URL Dot
- URLE.(me) Shrtnr (Long URL Shortener)
- URL Extractor
- URLFilter
- URL Fixer
- URL Fixer Plus RU and UA
- URL Flipper
- URL Focus
- urlG.in URL Shortener
- UrLinker
- URL in Tab Tooltip
- URLKick
- URL Link
- URL Lister
- URL Logger
- URL MultiCopy
- URL n Extension Block(UnE Block)
- UrlParams
- URL Parser
- URLPreviewer
- URL Relay
- URL Saver
- URL Security
- URL Shooter
- URL Shortener
- URL Shortener
- URL Shrink Easy
- URL Suffix
- urlsum
- URL Swap
- URL Tab Completion
- URL Tooltip
- URL Tooltip for Firefox 15+
- URL to QR code
- URN Support
- urVotes
- USA-Homepage
- USA-Newspapers-Visual-Directory
- UsableHomeButton
- USA Flag New Tab
- Usage Counter
- UsageFinder
- usd.onliner.by
- Used car buying off Craigslist helps research car quickly
- Usefull Short-cut
- Useful toolbar
- User-Agent JS Fixer
- User-Agent Switcher (SDK)
- User Agent Changer
- User Agent Quick Switch
- User Agent RG
- User Agent RG (FFox update)
- User Agent Switcher
- UserCSP
- Usersnap
- User Style Manager
- Ushare
- usi (User|Unified Script Injector)
- utf8 characters
- utnij.net
- uTube2mp3
- UT Viewer
- UxU - UnitTest.XUL
- Uyum FieldName Resolver
- V2 Screen Capturing in Firefox
- va.mu
- Vacuum Places Improved
- Valentine's Day 2014 Theme w/Personas Interactive
- Valentine's Day New Tab
- Valentines Day Interactive Theme
- Valgenesis Screensharing
- ValidateThisWebPage
- Validator
- Validaty
- Vamist
- Var scroll
- VasanSoft Chat Mechanic for Facebook
- Vaselineux
- Vault
- VB Title Expander
- vBulletin Image Uploader
- vCommission Deeplink Generator
- VdStudioS_Media_Extension
- vefstikan
- Velocity eStore Alertbar
- Veoh Video Compass
- Verical Marketplace Toolbar
- VERISIGN DomainView
- VeriSign EV Green Bar Extension
- Verizon Usage Monitor
- Version in Add-on bar
- Version Sanitiser
- versionshower
- Vertical Tabbar
- Vertical Tabs
- Vertical Toolbar
- Vertigo
- Vertippdich Search Toolbar
- vespertalessmiliekiller
- VG Cats Forums Menu
- Viamatic foXpose
- vian
- Vibe for Firefox
- VidConv Downloader for YouTube
- Video2Mp3
- Video2Mp3 Converter
- Video Audio Myxa
- Video Blocker
- Video Bookmarks
- Video DownloadHelper
- Video Filters for HTML 5 videos(beta)
- Videoflix
- Video Grabber
- VideoMakers.net Menu
- Video Mouse Wheel
- Video Page rememberer
- Video PopUp
- Video Sniffer
- VideoUnblocker
- VideoURLs.com Tools Add-on
- Vietnamese TTS
- ViewAbout
- View as Text [DEPRECATED]
- View Cookies
- View Dependencies
- View formatted source (format source extension)
- View Frames
- Viewhance
- View Image (Filename)
- View Image In New Tab
- ViewInFirefox (formerly FirefoxView)
- View in Office Online Viewer
- ViewMarks
- ViewMyBrowser
- View on Flickriver
- View on reddit
- View Page Source
- View Page Source in Tab
- view So Source
- View Source
- View Source
- View Source Chart
- View Source Choice
- view sourcecode
- View Source Code in the Same Tab
- View Source GCLI Command
- ViewStatePeeker
- Viewstate Size
- View Tab
- View Trace.axd
- View Your Certificates Email Address
- Vikings Gatherer
- Vikings Rune Shop
- Vimeo Dimmer
- VimFx
- Vimium
- vimkey
- vimkeybindings
- Vimkeys
- Vimperator
- Vimperator-ja
- vimxdebug
- Vine Video Download
- Vinilator
- Vintacore Stats
- VIP.Zappos.com Toolbar Button
- Viral Threat Level
- Virtualclassroom
- Virtual Keyboard
- Virtual Miracle 0.1
- VirusTotal
- Visitation Cloud
- Visit cdi-iran.org from Iran with no filter
- VisitChecker
- Visited
- Visited Link Supporter
- Visitrs - Chat with other visitors on your favorite web sites
- Visual Bookmarks
- Visual Bookmarks by All My Faves
- Visual Hashing
- Visual History
- VisualizeUs Official Firefox Extension - remember your favorite pictures
- Vivaty Scenes
- VKeyBoard
- VKfox
- VKMusicDownAll
- VKontakte.ru / vk.com MP3 Music Downloader
- VKontakte.ru / vk.com Video Downloader
- VKontakte.ru Downloader (music/videos/photos @ VK)
- Vkontakte disable away.php
- VKontakte Image Grabber
- vkshare
- Vlc context menu
- VLCWatcha
- VLP Aka Video Like Pass
- VMailFFLauncher
- vnDict - Vietnamese Dictionaries
- VnZ - MF Redirecter
- vn_addon
- Vocablurry - Effortlessly Remember New Words
- vocabmonk
- Vocabulary Highlighter
- vocaPOP
- Voizle
- Volatile Storage
- VOLSBB AutoLogin
- Volunia
- Voodle-huji
- Vote Detective
- Vote for Pets
- VoteTocracy
- Voucher Codes CoupoRando
- Vouchers.Im Indicator
- Voyage
- VozSafe
- vrusskoyraskladke
- Vtex Admin - Otimizacao de Interface
- vts_signup
- VTzilla 2.0
- vuepanel.com Screen-sharing
- Vãi.com
- W3Techs Website Technology Information
- waferthin
- Wait For Savings
- Wallbase NewTab
- Wallflower
- Walnut Theme Fix
- Wanfang URL Rewriter
- Wantlist
- Wapher
- WAPP2
- Wappalyzer
- warichu bar
- warn-before-quit
- Warrior Forum Formatter
- Wasalive Buzz
- Washburn University Theme w/ Personas Interactive
- wasted-time-calculator
- Watch LESS
- Watch Mode
- WatchPug
- Watch UK TV
- Watch with MPV
- Water Levels of German Rivers
- WATS
- WCAG Contrast checker
- wdcareff
- WDownloader WGrabber
- WDP Tool
- Weasyl Enhancer
- WeatherBug
- Weather Forecast Global
- Weather Now
- weather panel_n
- WEB.DE Coupon Alert
- WEB.DE MailCheck for Firefox
- Web2PDF
- Web2PDF Converter
- Webaroo Search Radar
- Webber-Tabs
- Web browser for children
- WebCensor - Profanity Filter
- WebChunks
- Web City Menu
- Web Clipper: Easy Screenshot
- Webcompat.com Reporter
- Webcompat.com Reporter for Android Mobile
- Web Console
- Webconverger
- WebDAV Launcher
- Web Developer
- Web Developer Toolbar Button
- WebDriver Backed Formatters
- Webdriver Element Locator (deprecating:see below)
- Web Filtering Toolbar
- WebFilter Pro - The web content filtering addon!
- Webgardi
- WebGL-Inspector
- Web Health Study
- Web History Repository
- Webistor
- Weblinkr Extensions
- Webmail Ad Blocker
- Web Marker
- Webmaster SAPE
- Webmedicalboard Screen Sharing
- Webmemes
- Webmention
- Web Metrics Framework
- WebMyStyles
- WebNotes
- WebODF
- Web of Trust, MyWOT/WOT: Website Reputation Rating
- Webpageanalyse
- WebpageDateChecker
- Web Page Fixer +
- Webpage Snapshot to Scrapbook
- Web Page Toolbar
- Web Paint
- Webpedia - query suggestion and topic explanation
- Web Personal Cleaner
- WebPG for Mozilla
- webproxy
- Webradiobar
- WebRank SEO Toolbar
- Webroot Reputation Toolbar
- Webroot Short URL Expander
- Webscout
- Webscrobbler with Now Playing Notifications
- WebSearcher
- Web Search Pro
- Web Security
- Web Server Check Tool
- WebShots
- Website City + Country Info
- Website Detective Hosting Information Provider
- Website History
- Website Informer Addon
- Website On Page Analyzer
- WebsiteOutlook Firfox Extension
- WebSitePulse Site Recorder
- WebSitePulse Test Tools
- WebSitePulse Transaction Recorder
- Website Record Hosting Information Provider
- Website SEO Analysis
- Web Slide Show
- WebSMS
- Web Startup Toolbar
- WebStatData Organic Report
- WebTaps
- WebToolHub - Free Webmaster Tools and Resources
- webusal
- Webutation - Reputation & Security
- WebVideoFetcher.com for Mozilla Firefox
- WebVisum
- WeDeliverOmaha.com Cart
- Weekdone
- Weekedit
- WeeRL
- WeeWar.com Notifier
- Wegtam Search Agent Quick Search
- weibo.cn
- Weibo in Firefox
- WellRounded
- We Love Deals!
- Wepware - Capture and Share Live Content
- Wessels Co-op
- Westminster College with Personas Interactive
- What's My Public IP
- What's Playing
- What's the Tide?
- What about:..
- What Did It Sell For?
- What does that mean?
- WhatFontis.com right-click shortcut
- whatmon
- WhatsOnMyBookshelf Wishlist Submitter
- Whats Public
- Wheater Siedlce ;)
- WheelClear
- Where2Shop
- Where Am O?
- WhereIsTheBeacon
- Where To Buy Search Engine
- Which? Shopping Toolbar
- WhilePaper(WallPaper While Loading)
- Whimsy
- whitelist javascript websites
- Whitelist Ninja
- White Noise Generator
- White on Black
- WhiteSmoke Dictionary Utilities
- White Sox Browser
- Whitespace Remover for Google Plus™
- WhoAmI?
- Who Commented
- whois
- WHOIS!
- Whois-Lookup
- Whois.com.au One-Click DNS Lookup
- Whois.com.au One-Click WHOIS Search
- Whois Detail Info
- WhoisDomain -All In One Site Lookup
- Whois it
- WhoIsLive Sidebar
- Whois Mind
- Who Is This Person?
- WhoLinks2Me.com Domain SEO Analyzer
- whos.amung.us Users Online Counter
- Who stole my pictures?
- WHS Download Manager Client
- WhyDoWork.com AdSense Monitor
- Wibbitz
- Wide screen stackexchange sites
- WiiFox
- Wikalong
- Wiki
- Wikia Toolbar
- Wikibox Intranet Client
- WiKID
- WikiDiff
- WikifyTabs
- Wiki It
- WikiLook
- Wiki Math Converter
- WikiMatrix
- Wikimedia+
- Wikimedia Debug Header
- Wiki on Speed
- Wikipath
- Wikipedia-References-Creator
- Wikipedia3D Toolbar
- Wikipedia Appeal Remover
- Wikipedia History
- Wikipedia Lookup Add-on
- Wikipedia Toolbar
- Wikipedia V2
- WikipediaWordCheckerInternational
- WikiSearch
- WikiSearch Concise
- WikiStats
- WikiTrust
- WikiTweak - Wikipedia Enhancer
- WikiTypo
- WikiZon
- wiki_enhancement_suite
- WiktionaryMultiLanguageDictionary
- WildFox Audio Add-On
- WildFox Video Add-On
- Wimbeep Firefox Extension
- Window and Tab Limiter
- Window Master
- Window Resizer
- Window Size Fixer
- Windows Shortcuts
- WindowsUpdate
- Wingate University Theme with Personas Interactive
- Winter Holiday Christmas Interactive Theme
- WIPS
- Wired-Marker
- Wisedock
- Wisedock Europe
- WishBin
- Wish Koala
- WishYaGift
- WISIGOTH
- WitchHammer
- Witchhammer
- WIU Libraries Research Toolbar
- Wizpert Chat Notifications
- WKW Stuff
- WKYC 3 News New Tab
- Wmeaning Dictionary
- wmlbrowser
- WMS Inspector
- WokiTalk
- Wolfram Alpha Google
- Wolfram|Alpha Toolbar
- Wonderpage Extension
- WonTube YouTube to MP3 YouTube Downloader
- Woodg.at
- WooGang
- Wookmark
- Woolik Search Tool – Logos for Google Search
- Woolik TweeTool – add logos to your twitter stream
- Woopages
- Woot! Watcher
- Woot-A-Holic
- Woot Watcher
- Woot Watcher Plus
- WoowNow.Com
- Wooword Bounce
- Word-Info
- word-later
- WordAddict
- WordCounter.net
- Word Counter for Blackboard®
- Word Count Plus
- WordLearner Toolbar
- Wordpress Toolbar
- Word Query
- WordReference Exporter
- WordReference Translator
- Words-Chinese Pinyin Dictionary
- WordWiseLookup
- Wordzen for Gmail
- Workbench Tools for Firefox
- Working YouTube Video Downloader
- Workspace
- Workspace Switcher
- WorldClient WebMail Notifier
- WorldClocks
- WorldCoolers
- WorldIP - Geo Add-on with Security Features
- World of Warcraft Realm Status Tool
- World Weather
- World weather online®
- World Wide Guestbook
- WoTMUD Quick char switch
- WOT ratings for Ecosia
- Would You Like to Know More?
- WowApp Smart Web
- WOW Trk
- wp it
- Wrap Switcher
- Wrike Modifications
- Write My Language
- WRTraffic
- Wrz.co AutoSubmitter
- Ws-news Reader
- wsad.it bookmarks
- WSTabReload
- Wstaw NIP
- WSTT - Writing System Transformation Tool
- WTF.co.in Image Upload via Right Click
- WTFi Scan
- WU Fast IT News 0.2
- www.hisi.hr
- www.linkaty.us best url shortener service
- www.Translate
- wykopTo - dodaj link do wykop.pl
- Wyona Yulup
- Wyszukiwarka filmowa
- Wyzebuy Extension
- x (Paranoia) mod
- X-Forwarded-For Header
- X-Forwarded-For Spoofer
- X-Forwarded-For Spoofer
- x-MuZiC.cOm / YouTube mp3
- X-notifier (for Gmail,Hotmail,Yahoo,AOL ...)
- X-notifier lite (for Gmail, Hotmail, Yahoo)
- X-Ray
- Xambox Web Capture
- xatAlert Tools
- XBELFox
- xCalendar
- Xceptance LoadTest Script Developer
- Xclear
- xdfacebidxd
- XE.com Universal Currency Converter �
- XE Currency Converter
- Xeropass
- XFox Live
- XHTML Mobile Profile
- XHTML Ruby Support
- Xing
- Xinha Here!
- Xirvik .torrent to seedbox uploader
- Xitek_Black_Plus
- XKCD Substitutions
- xMessages
- XML Developer Toolbar
- XML Digital Signature Tool
- XML Monospace
- XML Viewer
- xmpp4moz
- Xnet Usage Monitor
- XO
- Xoom
- XOWComics.com Toolbar
- XPather
- xpath finder
- XPCOMViewer
- XPICompiler
- Xplorify Live Screenshare
- xqjs
- XQuery USE ME (XqUSEme)
- XSL Results
- XSS Me
- Xsticky-Addon (Sticky-Notes)
- xThunder
- XUL/Migemo
- XUL Gear
- XUL Profiler (by yoono)
- xultray for gecko 1.9.0
- xultray for gecko 1.9.1
- xultray for gecko 1.9.2
- Xultris
- XVWeb Firefox Extension
- XyberFox
- Xyberhome
- Xλlo
- yaBeat - YouTube to MP3
- YAGO Linker
- Yah's Link Checker for Firefox
- Yahoo! Cricket
- Yahoo!Knowledge Plus Search Assistant
- Yahoo! Mail Extra
- Yahoo! Mail Notifier
- YahooDictionary05
- Yahoo Extension
- Yahoo Toolbar and New Tab
- Yahoo™ Notifier Pro
- Yair Lapid Stop Barking
- Yamli Smart Arabic Keyboard
- YammerFox
- Yandex.Bar
- Yandex.Metrika
- Yandex Slovari
- Yandex Switch Region
- YandexTranslate:anything-Russian & Russian-English
- Yandex Wordstat Helper
- Yant
- Yapta
- YAQB Extension
- Yasminoku sudoku
- YCat 1.0
- Yeezify
- Yellow-Urlbar
- Yellowpipe Lynx Viewer Tool
- Yelp Search Toolbar
- Yeshiva University Theme with Personas Interactive
- YesScript
- Yet Another Context Search
- Yet another dictionary look up and text translator
- Yet Another Remove It Permanently
- Yet Another Smooth Scrolling
- Yet Another Window Resizer
- yExplore
- YggDore Sky Gate Toolbar
- Yield Manager Toolbar
- Yinghuaxuan Dictionary
- YMail Notifier
- Ynet Helper
- YNET is not press
- YOKA at Tool
- YongcheUtil
- Yoolink
- Yoolki Arabic Keyboard
- Yooper
- Yopine Dashboard v1.0
- you2repeat
- youffan Sports Community
- Youlicit Toolbar
- YouLoop
- youMP3me - "download" button for Youtube
- YouPlayer
- YouPop
- YouRepeat
- YouRepeat This
- YOURLS shortener
- yourminis.com HUD
- YourOnlineChoices Plugin
- Your Own Search Bar
- YourPaste
- YourVersion Toolbar
- YouSendIt for Webmail
- YouSticker
- YouTube - Now Playing Notifications
- YouTube.Censor
- Youtube.com player Resize
- YouTube 2 Player
- YouTube2mp3.ca
- youtube2mp3extract
- YouTube Advance Search And Downloader for Firefox
- YouTube Animated Thumbnails
- YouTube Anywhere Player
- Youtube AutoPlay Stopper
- YouTube Auto Replay
- YouTube Auto Replay
- YouTube Button
- YouTubeButton
- YouTube Caption Downloader
- Youtube Checker
- YouTube Cinema
- Youtube Comment Blocker
- YouTube comments remover
- YouTube Control Center
- YouTube Converter
- YouTube Download
- YouTube Downloader - TubeGrabber ►
- YouTube Downloader @ps
- YouTube Downloader and Converter
- YouTube Embed2Link
- YouTube Enhancer Plus
- YouTube Flash Player
- YouTube Flash Video Player
- YouTube HD Plus
- YouTube High Definition
- YouTube HTML5 Switch
- YouTube in HD (720p, 1080p, 1440p, 2160p)
- YouTube IT
- YouTube mp3
- YouTube MP3 Converter
- YouTube MP3 Download
- YouTube MP3 downloader by GreenMP3
- YouTube MP3 Downloader for Firefox
- YouTube MP3 Downloader using youtube-download.net
- YouTube MP3 Downloader using youtube-download.org
- Youtube MP3 Downloader using youtube-mp3.org
- YouTube MP3 Easy Downloader
- Youtube MP3 Podcaster
- YouTube MP4
- Youtube netPlayed Plugin
- YouTube Object2iframe
- Youtube Quick Search & Open Loc
- Youtube Rapid Filter
- Youtube Ratings
- Youtube Ratings Preview
- YouTube Repeater
- Youtube Replay
- YouTube SideBar Player
- YouTube Stretch
- Youtube subscriptioner
- YouTube Time Bookmarks
- Youtube to audio converter
- Youtube to MP3 - Convert YouTube to mp3 easily
- Youtube to mp3 converter - AudioThief.com
- Youtube to MP3 Converter - High Quality MP3 it
- YouTube To MP3 Converter - Uscorpion
- Youtube to MP3 Converter - Xenra.com
- Youtube to MP3 Plugin
- Youtube To MP3 PRO
- Youtube to Mp3 | Mp3Grabby
- YouTubetoMP3.tv
- Youtube Tooltip
- Youtube to Playit.pk
- Youtube Uploads Only
- YouTube video auto-replay!
- YouTube Video Downloader - For Context Menu
- YouTube Video Download Links
- YouTube video quality manager
- YouTube Video Replay
- YouTube Videos Auto High Definition 720p (HD)
- YouTube Videos Auto High Definition 1080p (HD)
- YouTube Videos Download in one click
- YouTube Views Facts
- YouTube without DASH Playback (fully buffer)
- Youtube™ Search
- YouTune
- Youzign
- YPU
- YSearchApp1
- yshack
- YSlow
- YT.fm YouTube Scrobbler
- YTshowRating
- YubNub Command Line
- Y U no validate
- z3d-mfa
- z3lda
- z3ta-bookmark-service
- Z:wordz
- Zang Spaces Utility
- Zaphod
- ZappySearch
- ZapTatkal
- ZapTo.Us Price Search Bar
- Zaqwes Translate
- ZaSe newtab
- ZavuURL Generator
- Zeadoo Extension
- Zeal.ChinaStock
- zEditor
- Zeezaw for Firefox
- Zelda Tab Theme Wallpaper
- Zenbu-Robot
- ZenbuShiitake
- Zendesk comment collapse
- ZenMate Security & Privacy VPN
- Zero Internet
- Zevera Linkifier
- Zhong Wen
- Zhong Wen Jie Shi
- ZhyperMU GrudgeMU FortressMU
- ZibZoom ToolBar
- Ziftr Alerts (formerly FreePriceAlerts)
- Ziggy Marley Theme with Personas Interactive
- ZillaImage.co.cc Free Image Hosting
- ZINC
- Zing! Locale Switcher
- Zinsrechner
- Zippy Extension Packager
- ZipZoom
- ZK Jet
- Zoho Companion For Firefox(Formerly Zoho QuickRead)
- Zoho Notebook Helper
- Zombie Keys (Multilanguage Keyboard)
- Zone-X.Ru Toolbar
- ZoneMinder Client
- zoomFox
- ZoomInto
- Zoom Page
- Zoomr
- Zoom toolbar
- zoom_pict
- Zorcher
- Zot2Bib
- Zotero autoexporting
- Zotero autotranslating
- Zotero bibliography Locale Switcher
- Zotero plugin for MONK Project
- ZoteroQuickLook
- ZotFile
- Zrzuta!
- Zscaler Likejaking Prevention
- Zscaler Safe Shopping
- ZTMeeting
- Zukmo
- Zutilo Utility for Zotero
- zValido
- Zvini Quick
- ZXXeverywhere NSA & Snooping Proof Font Tool
- Zybez RuneScape Help Official Toolbar
- [BETA] Double-click Image Downloader
- µBlock
- Öffnungszeiten
- ďťňľ - Doplň diakritiku
- İdíl-Ural Tatarça Tíl Distesí [Qazan Tatar LP]
- İngilizce Çeviri
- İTÜ Ninova Ders Gör
- 一淘快捷工具
- 优酷视频下载器
- 分享一段话到微博
- 勿忘訂便當
- 天津速创科技-二维码在线生成
- 微博急简
- 快读
- 惠买购物助手(网购比价利器)
- 百度贴吧Metro美化样式
- ОКМДМ
- Актуальный Навальный
- Антитролль
- Визуальные закладки Миксилинк (сделать домашней)
- Информер баланса "СетиТагила"
- Постсовет
- מחולל טבלאות (FXP)
- افزونه خرید شارژ یکــ همراه
- الباقيات الصالحات
- الذاكر - اذكار وادعيه
This page is part of the LegacyCollector website.
Disclaimer: All material on this site is property of their respective owners and available under
open licenses to the best of our knowledge. If you are an author and would like anything removed,
then please write an e-mail to legacy [at] collector dot org.