: Downloading web browsers from unverified third-party repositories poses malware hazards. Always fetch legacy binaries directly from the official Mozilla CDN Archive. 💾 Step-by-Step Installation for OS X 10.10.5
: You can download Firefox 130+ or the latest 2026 build on OS X 10.10.5 by bypassing system requirements.
A: Yes – Firefox Sync works on 78 ESR (sign in with a Mozilla account). firefox download for mac 10105 upd
Alternatively, if you want to choose a specific language for your Firefox installation, you can click the link at the bottom of the page. This will redirect you to a page where you can manually select your preferred language and download the corresponding installation file.
If you meant instead of 10.10.5, let me know and I’ll give you the latest compatible Firefox link. A: Yes – Firefox Sync works on 78
If you are using macOS 10.12 to 10.14, you will be redirected to download the latest Firefox 115 ESR version from the official site.
https://archive.mozilla.org/pub/firefox/releases/ If you meant instead of 10
Here is the information you need regarding the final compatible version and how to download it: The Final Compatible Version
A: Reasonably safe for non-sensitive browsing, provided you do not log into critical accounts. It is safer than Safari 10 (which is fully broken on Yosemite) or Chrome 87 (also deprecated).
To download and install Firefox on your Mac, follow these steps:
If you do not see the Finder window with the Applications folder shortcut, you can simply drag the Firefox icon from the opened disk image into your Applications folder using a separate Finder window.