Mac 10105 Upd | Firefox Download [better] For

The absolute latest official version of Firefox that supports OS X 10.10.5 is Firefox 78.15.0 Extended Support Release (ESR)

If your Mac hardware supports it, the best "update" isn't a new browser—it’s a new OS.

Report: Firefox Support for macOS 10.10.5 (Yosemite) Executive Summary firefox download for mac 10105 upd

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

A: Absolutely not. Firefox 115 ESR requires macOS 10.15+. The absolute latest official version of Firefox that

: You can download this specific legacy version directly from the Mozilla FTP Archive. How to Install

This version no longer receives security updates from Mozilla. How to Download Firefox 115 ESR requires macOS 10

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.