https://support.mozilla.org/en-US/kb/firefox-users-windows-7-8-and-81-moving-extended-support
Firefox version 115 will be the last supported Firefox version for users of Windows 7, Windows 8 and Windows 8.1. If you are using these versions of Windows you will be moved to the Firefox Extended Support Release (ESR) channel by an application update. Mozilla will provide security updates for these users until September 2024. No security updates will be provided after that date…
Can I still browse safely with Firefox Windows 7, 8 and 8.1?
Mozilla is providing critical security updates through the Firefox ESR channel up until the end of ESR version 115, September 2024. After this, no security updates are provided and you are strongly encouraged to move to a supported version of Microsoft Windows…