Mozilla has ceased support for Firefox on Windows 7, Windows 8, and Windows 8.1, with the final version available being Firefox 115. Users will continue to receive updates through the Firefox Extended Support Release (ESR) channels until February 2026. This decision follows Microsoft's end of support for these Windows versions in January 2023. Mozilla encourages users to upgrade to newer operating systems like Windows 10 or Windows 11, or to switch to Linux. Additionally, Mozilla has faced criticism regarding plans to transform Firefox into an AI-driven browser, but assured users that all AI features will be optional.