| Step | Action | |------|--------| | 1 | Open archive.mozilla.org/pub/firefox/releases/ | | 2 | Click 78.15.0esr/ | | 3 | Click mac/ | | 4 | Click your language folder (e.g., en-US ) | | 5 | Download Firefox 78.15.0esr.dmg | | 6 | Install, then disable automatic updates | | 7 | Enjoy the latest possible update for Mac 10.10.5 |
Mainstream Firefox (Versions 78+) dropped support for OS X 10.10 and 10.11 in mid-2021. The last compatible series is Firefox 78 ESR (Extended Support Release). However, a later ESR – Firefox 91 ESR – initially required macOS 10.12+. But community reports indicate Firefox 78.15.0esr is the final official build for 10.10.5. firefox download for mac 10105 upd
Modern versions of Firefox no longer support macOS 10.10. Support for this operating system officially ended on . | Step | Action | |------|--------| | 1 | Open archive
However, you can still get Firefox running by using a specific older version. Here is what you need to know to get back online safely. The Best Version for Yosemite: Firefox 78 ESR But community reports indicate Firefox 78
If your hardware allows it, experts recommend upgrading your macOS to at least 10.15 Catalina
: Drag the Firefox icon into your Applications folder .
Because standard download pages automatically offer the newest version (which requires macOS 10.15 or later), you must access Mozilla’s archives directly to find the compatible file: