Firefox Legacy

Firefox Legacy is an unofficial modified version of Mozilla Firefox that works on Mac OS X 10.7 Lion, 10.8 Mountain Lion, and all later versions.

Download it now and breathe new life into your old Macs!

Mac OS X 10.6 and older are not, and will never be, supported, due to technical limitations.

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Current version for OS X 10.8 Mountain Lion: 69.0p2 (2019-09-15)

Previous version which supports OS X 10.7 Lion: 67.0.4p1 (2019-06-21)

Source Code

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Known Issues

• Small problems with displaying right-to-left languages on OS X 10.7
• The crash reporter does not work on OS X 10.7 (it itself crashes)
• A useless empty share menu is visible on OS X 10.7
• The sandbox (a security feature intended to protect you from malicious websites) does not work on OS X 10.7 or 10.8, and has been disabled on those versions
• No automatic updates