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Firefox version 49 and above are no longer supported on Mac OS X 10.6, 10.7 and 10.8. Learn more about your options.

{for win, linux}{warning}This article applies to Mac users only.{/warning}{/for} Firefox 49 requires Mac OS X 10.9 (Mavericks) or higher. If you are on an earlier version of Mac OS X, there are options for you to continue using a secure version of Firefox. {note}Visit this [https://support.apple.com/en-us/HT201260 Apple Support page] to find your version of OS X.{/note} =Option 1: Upgrade to an OS X version supported by Apple= In order to continue browsing safely, we recommend upgrading to an OS X version that Apple supports. Visit this [https://support.apple.com/en-us/HT201541 Apple support page] to learn more about upgrading. While Firefox will still continue to work on unsupported versions, using Firefox on a supported version will provide you with the best and safest user experience. =Option 2: Download Firefox Extended Support Release (ESR) - until January 2017= Firefox Extended Support Release (ESR) version 45 will continue to receive updates on OS X 10.6, 10.7 and 10.8 until 2017. Version 45 is the last ESR version to receive updates. In 2017, ESR 45 will no longer be supported. See the [https://www.mozilla.org/firefox/organizations/faq/ Firefox ESR page] to download Firefox ESR. {note}'''Note:''' Some Firefox features might not be available on ESR.{/note}