Starting with Firefox version 49, Firefox requires Mac OS X 10.9 (Mavericks) or higher. Visit this Apple Support page to find your Mac OS version.
If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version that Apple supports. Visit this Apple Support page to learn more about upgrading your Mac.
While insecure versions of Firefox will continue to work on OS X 10.8 and earlier, using an up-to-date version of Firefox on a supported version of Mac OS will provide you with the best and safest user experience.
Firefox For Mac 10.7
Dbl click to download, locate the Firefox 45.9 ESR.dmg on your Mac. Dbl click on the file and it should put up both a disk drive looking image and a pop up installation window. Drag the Firefox Application icon into the Application folder shortcut icon in the same install window. The go to your Applications folder, find Firefox, the launch it! Firestorm Update 6.3.9.58205! KittyCatS CareKitty! Mankind Tracer returning to SL! Join The Firestorm Team! Firestorm 6.3.2.58052 with BoM! The good, the bad and the ugly. December 2020; October 2020; September 2020; July 2020; May 2020; March 2020; October 2019; September 2019; July 2019; February 2019; December 2018. OldVersion.com Points System. When you upload software to oldversion.com you get rewarded by points. For every field that is filled out correctly, points will be rewarded, some fields are optional but the more you provide the more you will get rewarded! I have the last version of firefox (10.0.2) on Mac OS 10.7.3 but often i receive this message: 'your browser is outdated'. Recently, i noticed that google analytics reference my visit on my own website in 'browser stat' as Firefox 3.5.5.