In the meantime, we strongly encourage our users to upgrade to mac OS X 10.12 or higher to benefit from the security and privacy updates.įor more information please visit the Firefox support page. It will be a sad day, as Firefox is the last major browser to support Mac OS X 10.6 through 10.8. At that point, Mac users using OS X 10.6 Snow Leopard, 10.7 Lion, and 10.8 Mountain Lion will be left behind by the current versions of Firefox.
It is scheduled to be replaced by Firefox 49.0 on September 13, 2016. Most recently, Mozilla ended support for OS X 10.910.11 in Firefox 79, with those users being supported on the Firefox 78 ESR branch until November 2021. On August 2, 2016, Firefox 48.0 was released. On June 30th, these macOS users will automatically be moved to the ESR channel through application update. The system requirements were left unchanged until 2016, when Firefox 49 dropped support for Mac OS X 10.610.8.
Users do not need to take additional action to receive those updates. Unsupported operating systems receive no security updates, have known exploits, and can be dangerous to use, which makes it difficult and less than optimal to maintain Firefox for those versions. The last security update applicable to macOS 10.11 was made available nearly 2 years ago in July 2018 ( ). While Apple doesn’t have an official policy governing security updates for older macOS releases, their ongoing practice has been to support the most recent three releases (i.e. On June 30th, macOS 10.9, 10.10 and 10.11 users will automatically be moved to the Firefox Extended Support Release (ESR).
