Firefox Legacy
- Get the not-for-profit-backed browser on Windows, Mac or Linux. Firefox for Android. Version 44.0, first offered to Release channel users on January 26, 2016.
- Download Mozilla Firefox, a free web browser. Firefox is created by a global not-for-profit dedicated to putting individuals in control online. Get Firefox for Windows, macOS, Linux, Android and iOS today!
- Firefox Legacy is an unofficial modified version of Mozilla Firefox that works on older Mac OS X versions, including 10.6 Snow Leopard, 10.7 Lion, and 10.8 Mountain Lion. Download it now and breathe new life into your old Mac. OS X 10.8 Mountain Lion. Current version for OS X 10.8 Mountain Lion: 71.0p2.
- The version number is listed underneath the Firefox name. Here is an example of what the About Firefox window will look like: Opening the About Firefox window will, by default, start an update check. If an updated version of Firefox is available, it will be automatically downloaded.
Firefox Mac OS X 10.9, 10.10 and 10.11 users move to Extended Support Release Note: Firefox version 83 and higher support both Intel-based Macs (x86 architecture) and Apple devices with the new ARM-based CPU (Apple Silicon).
Firefox Legacy is an unofficial modified version of Mozilla Firefox that works on older Mac OS X versions, including 10.6 Snow Leopard, 10.7 Lion, and 10.8 Mountain Lion.
Download it now and breathe new life into your old Mac.
OS X 10.8 Mountain Lion
Current version for OS X 10.8 Mountain Lion: 71.0p2 (2020-09-15)
IMPORTANT NOTE ABOUT UPDATING TO v71: A new Firefox profile will be created when you update from earlier versions to version 71.0. To restore your previous data, type 'about:profiles' in the address bar, then find your previous profile (if you can't tell which, try each one) and set it as default. Then, restart Firefox Legacy. I apologize for the inconvenience; the cause of this issue is not known.
OS X 10.7 Lion
Current version for OS X 10.7 Lion: 68.12.0p3 (2021-01-24)
Now featuring support for numerous newer web standards, including Push, Service Workers, Feature Policy, ResizeObserver, Promise Rejection Events, more of the Animations API, and several CSS features. This should improve compatibility with many websites.
For security and privacy reasons, starting in version 68.12.0p3, support for TLS 1.0 and 1.1, HPKP, and the Battery API is disabled.
OS X 10.6 Snow Leopard
Only Firefox 52 is available for OS X 10.6 Snow Leopard; it will not be updated to a recent version due to technical limitations of the OS.
Note: the program is called 'Nightly' due to licensing restrictions prohibiting the use of the official Firefox branding.
Current version for OS X 10.6 Snow Leopard: 52.9.1p1 (2020-04-11)
Firefox Legacy speaks your language!
Any of the language packs for the matching official Firefox version are supported.
- List of language codes (to help you locate the right file to download)
Cached
Known Issues
Mozilla Firefox Free Downloads For Mac
- Small problems with displaying right-to-left languages on OS X 10.7
- The crash reporter does not work on OS X 10.7 or 10.8 (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, and has been disabled
- On OS X 10.7, the browser crashes when the camera or microphone are used
- WebGL does not work on computers with GPUs not supporting OpenGL 3.0 (many 2006-2007 Macs)
- Some buttons are invisible on Google Calendar, WordPress, and other sites that use font-based icons
- DRM (Encrypted Media Extensions/Widevine) does not work
- Version 68.12.0 only: Screen capture does not work and has been disabled
- Version 71.0 only: The progress bar is not visible on the icons of downloading files in the Finder