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. On June 30th, these macOS users will automatically be moved to the ESR channel through application update. Users do not need to take additional action to receive those updates. Mozilla Firefox® ESR, Portable Edition is the Extended Support Release of the popular Mozilla Firefox web browser bundled with a launcher as a portable app, so you can take your browser, bookmarks and passwords with you.It is always a different version than Stable according to our ESR release schedule.It is intended for groups who deploy and maintain the desktop environment. 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).