: Go to your Applications folder and double-click Firefox . If prompted with a warning that the app was downloaded from the internet, click Open . Why You Need Firefox 78 ESR
Once the download is complete, follow these steps to install: download firefox for mac os x 10.11 6
Mozilla moved El Capitan users to the channel to provide critical security updates for a longer period. While this version is now "End of Life" (EOL) and no longer receives new security patches, it remains one of the most stable and compatible browsers for older hardware. Benefits of using this version on El Capitan: Firefox for Mac/OS 10.11.6 (Mac/OS X El Capitan : Go to your Applications folder and double-click Firefox
Look for the file ending in , such as Firefox 78.15.0esr.dmg . Click to start the download. Step 2: Install Firefox on Your Mac While this version is now "End of Life"