https://www.ghacks.net/2022/11/01/mozilla-may-extend-firefox-on-windows-7-and-8-1-support/
…Mozilla considers two main options right now:
End support in January 2023.
Extend support until at least June 2023.Ending support in January 2023 would alienate about 15% of the browser’s user base. These users could continue to run the then-unsupported browser, similarly to how Chrome users can do so starting in February 2023. Some might move to a different browser, depending on whether it continues to be supported on their platform.
This option would remove a lot of headaches regarding testing, development tools and other tasks related to engineering. The downside would be that Firefox would lose a percentage of its user base over night.
The second option that Mozilla considers extends support until the release of the next Firefox ESR version. Firefox users on Windows 7 and 8.1 would be moved to Firefox 102 ESR, the current Extended Support Release branch, and would receive updates until Firefox 102 ESR is moved to Firefox 114 ESR; this happens in August 2023.
What appears to be clear is that Mozilla’s support for Windows 7 and 8.1 will end in 2023…