Since the main Firefox download page only offers the current version (which requires macOS 10.15 or later), you must access the Mozilla FTP Archive to find the correct installer.
Visit the Firefox 78.15.0esr directory on the official Mozilla server. firefox download mac el capitan
The last official version of Firefox that supports OS X 10.11 El Capitan is . This version was created specifically to provide a stable, secure browsing experience for older systems after regular updates ended. Release Date: October 5, 2021. Since the main Firefox download page only offers
It was the final effort to keep older Macs connected to the modern web safely. How to Download and Install firefox download mac el capitan
Click the link for the .dmg file to begin the download.