Firefox Download For Mac 10105 Upd !free! Jun 2026

: Go to the Mozilla CDN Directory for version 78.15.0esr .

Ensure that the browser does not attempt to auto-update to a modern version, as this will break the application on your system. Navigate to Firefox Preferences > General > Firefox Updates and select "Check for updates but let you choose to install them." Long-Term Alternatives for OS X 10.10.5

If you are searching for the exact phrase , you are likely facing a common but frustrating problem. You own a Mac running OS X Yosemite (version 10.10.5), and when you try to download the latest Firefox from Mozilla’s website, you are greeted with an error message: “You cannot use this version of the application with this version of macOS.”

Do not install any offered update to Firefox 91+ or 100+. It will become unusable on 10.10.5. firefox download for mac 10105 upd

Download the file: Firefox 78.15.0esr.dmg (size ~85 MB).

If Firefox is running slowly, consider these solutions:

Is your older Mac running macOS 10.10.5 Yosemite, and you’re struggling to find a functional, secure web browser? While Safari has long ceased updating on this operating system, remains a viable, secure alternative, provided you use the correct version. : Go to the Mozilla CDN Directory for version 78

Wait for the progress bar to finish copying the files to your hard drive.

Before downloading, let’s break down the keyword:

Using outdated browsers on old operating systems like 10.10.5 (Yosemite) exposes you to significant security risks, including malware, phishing attacks, and the inability to load modern encrypted websites (HTTPS). You own a Mac running OS X Yosemite (version 10

Look for the folder named (the final 78 ESR). If you want the absolute last version for 10.10.5, choose:

Note: You can replace en-US with your local language code (e.g., fr , de , ja , zh-CN ).

Important note