We still don't have an official EOL date for XP support, but moving the platform to the ESR branch means that we will *not* need to worry about new feature support for XP which is becoming increasingly difficult. We've decided to move Windows XP to the Firefox 52 ESR branch, so that Firefox 51 will be the last mainline version to support the platform.
Firefox 51 is therefore the last version of the browser that is not ESR. Initially there shouldn't be an issue with running but eventually we'll import a system dependency that will break browser startup.Īnother bug, bug 1303827, highlights Mozilla's plan to move XP users to Firefox's ESR branch when version 52 gets released. Once 52 merges to aurora, we should land changes to the stand alone installer to prevent install by XP and Vista users. We plan to eol XP/Vista by first moving those users out to ESR 52. Tip: load about: in Firefox's address bar to display the version of the browser installed on your machine.īug 1305453 on Bugzilla lists the plan to stop stand-alone Firefox 53 and up installers from installing Firefox on XP or Vista machines. Firefox 53: no support for Windows XP or Vista
The organization plans to migrate Firefox users on XP or Vista to Firefox ESR automatically however to extend support. It is unclear whether it plans to block execution of portable versions of Firefox as well. Mozilla explicitly mentions installations that it plans to block. This means that Firefox 52 will be the last feature update for those operating systems, as Firefox 53 cannot be installed anymore on those operating systems.
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