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.

The good news for Mozilla Firefox users on Windows XP is that as soon as Mozilla 53 is released, the previous version is going to be moved to the ESR (Extended Support Release) branch, meaning Mozilla will still provide updates for Firefox 52 until mid-2018.

If you’re still on Windows XP and Firefox is your main browser, you have two options: stick to Mozilla 52 or change your browser. Mozilla Firefox 53 is scheduled to be released in March 2017 but users won’t be able to install in on Windows XP and Vista. The latest example is Mozilla, which just announced that its Firefox browser won’t support Windows XP starting from version 53. Additionally, Mozilla will discontinue support for Windows Vista as well.

Software companies have been moving away from Windows XP for years now. Like it or not, you'll probably have to consider a new OS (or a new PC) if you want to experience the modern internet next year.Home › News › Firefox drops support for Windows XP in 2017 However, it's still a big deal if you're stuck on a work PC or otherwise haven't had a chance to upgrade to a newer version of Windows. There aren't likely to be many people who both run a 10-year-old operating system and care enough about their web experience to use a recent browser, so the impact may be limited. But when security flaws are hard to avoid, it'll be impractical to keep using Firefox on those platforms when you could remain permanently vulnerable to exploits. This doesn't mean that Firefox will stop working on XP or Vista in September, of course.

And while the company plans to unveil a final support end date in the middle of that year, it'll effectively cut the cord in September, when it stops delivering security updates. Mozilla will start by moving users on these operating systems to the Extended Support Release in March 2017, limiting them to feature updates that can be 'several cycles' behind the curve. However, even that team has its limits - it's phasing out support for XP and Vista starting next year. To this day, Mozilla's latest software can work with your decade-old PC. Numerous web browsers have already stopped supporting Windows XP and Vista, but not Firefox.

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