Firefox For Mac Mountain Lion [new] Download Info

Since these versions are no longer on the main Firefox download page , you must access them via the official Mozilla FTP archive. Navigate to the Mozilla archive for v45.9.0esr . Download the .dmg file.

This was the final standard release that officially supported Mountain Lion.

Chosen Solution ... Not advisable to use Firefox 48 which was the last version for 10.8 Mountain Lion. ... Actually Firefox 45. 9. Support Mozilla Web browser for Mountain Lion - Apple Communities firefox for mac mountain lion download

If you're looking to download Firefox for Mac OS X 10.8 Mountain Lion, it's important to know that Mozilla officially ended support for this operating system years ago. Because newer versions of Firefox require macOS 10.12 or later, you must use a specific "legacy" version to browse on an older machine. The Last Compatible Version of Firefox

You may encounter "Your connection is not private" messages because the security certificates in the old OS have expired. Modern Alternatives for Old Macs Since these versions are no longer on the

If you get a security warning, hold the while clicking the app and select Open . Security and Performance Risks

Using an outdated browser on an old OS carries significant risks: This was the final standard release that officially

If Firefox 45.9.0 is too limited for your needs, consider these community-driven alternatives: old version of firefox for os 10.8.5? - Mozilla Support