Firefox will stop supporting Windows XP and Vista

Https://support.mozilla.org/zh-CN/kb/firefox-windows-xp-vista

Firefox version 52 is the last complete upgrade for Windows XP and Windows Vista. There will also be a security update release, but no new features are available.

Why does Firefox stop supporting Windows XP and Vista?

Firefox is the only existing browser that also supports Windows XP and Vista. Microsoft has no longer supported Windows XP itself since 2014 and will stop supporting Windows Vista in 2017. The lack of a supported operating system without security updates, often with known vulnerabilities, is dangerous, so it is very difficult to maintain Firefox on those operating systems.

The Firefox security update for XP and Vista users continues until September 2017, even if new features are no longer available. In the mid 2017, we will announce the last support date based on the number of users who are still using Windows XP and Vista.

Firefox will stop supporting Windows XP and Vista