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.
![Mac Mac](/uploads/1/2/6/4/126429341/907133931.jpg)
If you're using an outdated version of Firefox on Mac OS X 10.8 (Mountain Lion) or earlier, the only way you can update Firefox to a secure version is to upgrade your Mac OS to a version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.
![Update Update](/uploads/1/2/6/4/126429341/982369974.png)
Firefox For Mac Os
Note: If you have Mac OS X 10.7 (Lion) or 10.6 (Snow Leopard), you will need to download OS X El Capitan before you can upgrade to the latest Mac OS.
Firefox For Mac Os X 10.6 8 Download
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 Update For Mac Os X 10.6.8
While the developer is fixing the problem, try using an older version. If you need the previous version of Firefox, check out the app's version history which includes all versions available to download. Download prior versions of Firefox for Mac. All previous versions of Firefox are virus-free and free to download. Important: If the update didn't start, didn't complete or there was some other problem, you can go to the Systems & Languages page to download and install the latest version of Firefox for your system and language or you can use this download link (see How to download and install Firefox on Windows Install Firefox on Linux How to download and install Firefox on Mac for more information). The beta for it is out now for download and includes the new Servo engine whose performance couldn't be more heartening: Firefox is now twice as fast as it was a year ago. Although version 56 isn't set to auto-update to Quantum on iOS/Android and desktops until November 14, you can get a sneak peek by installing the beta via APK.