Hate the rounded corners inside firefox. Disabled them in windows 11 a long time ago, now you have them inside firefox itself.

[brainetree]

Is the rounded corners inside Firefox something new?  Got rid of them in Windows 11 like a lot of people do and keep them square again after updates and here you betray me.  LOL.

[Agentvirtuel]

Hello

A subject.
https://www.reddit.com/r/FirefoxCSS/comments/1ov0806/does_anyone_know_how_we_can_unround_our_tabs

And, for information purposes.
https://support.mozilla.org/en-US/questions/1546836#answer-1778873

[brainetree]

The dreaded rounded corners are back, what a burden to have to research and find out how to disable it.  Why don't you just give us that option?  I can not accept the rounded corners AT ALL.  Thank you for listening.  I have a lot of other things on my mind, but have to spend no telling how long to figure out how to get rid of those rounded corners.

[Agentvirtuel · Accepted solution]

Hello

Have you tested.

/* In userChrome.css */
:root {
  --border-radius-medium: var(--border-radius-small, 4px) !important;
}

Have you tested.

/* In userContent.css */
@-moz-document url-prefix("about:"), url-prefix("chrome:") { /* Firefox pages like settings etc. */
  :root {
    --border-radius-medium: var(--border-radius-small, 4px) !important;
  }
}

Have you tested, userChrome.css and userContent.css, together.

[kailasanathan_k]

Wait, Does these works in Android?

[brainetree]

Yes Agentvirtuel, I tried those possibilities just as you suggest and they finally worked!  Thank you, what a joy and relief! 

[Agentvirtuel]

Hello

For my part, tested.
https://www.youtube.com/watch?v=iEmaI4ciUFM