Firefox reportedly only ended support for 2001 OS Windows XP (and Windows Vista) in 2023, which means a pretty impressive 19 years of support (accounting for Firefox 1.0 releasing in 2004).
Windows 11 February 2026 update adds Cross-Device Resume, MIDI upgrades, security fixes, and major bug fixes for 24H2 and 25H2.
Windows 11 KB5077181 25H2 out with new features, direct download links for offline installers (.msu)
Windows 11 KB5077181 is now rolling out on version 25H2 with a new Cross Device Resume feature, Smart App Control changes, and more.
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