Firefox Download For Mac 10105 Upd [new] -

macOS 10.10.5 (Yosemite)

For , the final supported version of Firefox is Firefox 78 ESR . You can still find this legacy installer through official Mozilla Support channels or verified archives like Macintosh Repository . The Ghost in the Machine: A Yosemite Elegy

. Users remaining on this legacy OS face significant security risks as this version ceased receiving critical security updates in October 2021. Technical Findings Last Compatible Version firefox download for mac 10105 upd

: Firefox 78.15.0esr is the terminal build for macOS versions 10.9 through 10.11. Security Status macOS 10

Troubleshooting Common “10105” Errors

Official Mozilla Archive:

You can download the English (US) installer directly from the Mozilla CDN. File Name: Firefox 78.15.0esr.dmg Users remaining on this legacy OS face significant

Since the main Firefox download page will typically offer the newest version (which requires macOS 10.15 or later), you must use the official archive for the older version. Mozilla Support Download the Installer : Access the Official Mozilla Archive for 78.15.0esr to download the Open the DMG

If you try to download the standard installer from the main Mozilla homepage, you will likely receive a message that your operating system is incompatible.

If you're using Mac OS X version 10.10.5 (Yosemite), you can still run an older but stable version of Firefox that is compatible with your system.