


Microsoft no longer supports Windows XP at all, and Windows Vista drops out of extended support on April 11, 2017. New features, however, will be restricted to the mainline version of Firefox.

Firefox 52 is an Extended Support Release it will receive security fixes (and only security fixes) for approximately one year. Future major versions of the browser will require at a minimum Windows 7. The release is the final major version to support two legacy operating systems: Windows XP and Windows Vista. Firefox 52 is out today, and it's a landmark release for a couple of reasons.
