For macOS 10.10.5 (Yosemite), the final compatible version of Firefox is . Because modern versions of Firefox require macOS 10.15 or later, you must manually download this specific "Extended Support Release" (ESR) version from Mozilla’s archives. Guide to Downloading Firefox for Mac 10.10.5
: When you first open it, macOS may warn you that it’s an application downloaded from the internet. Click Open to proceed. Key Considerations and Risks firefox download for mac 10105 upd
The last version of Firefox that supports Mac OS X 10.10 is (Extended Support Release). For macOS 10
: Because it is an older version, macOS may ask for confirmation before opening the app for the first time. Security Warning Click Open to proceed
Apple no longer supports OS X Yosemite, but Mozilla has historically provided extended support releases (ESR) for older Macs. This article will walk you through exactly how to find, download, install, and troubleshoot , ensuring you get the final secure update available.
Firefox is a popular web browser that offers a range of benefits, including:
While version 78.15.0 ESR is the "best" choice for Yosemite, there are important caveats to keep in mind: