Firefox 109, scheduled for release on Tuesday, January 17, 2023, was built with support for Windows 7 (according to the Beta system requirements).
Firefox 110, currently in pre-beta testing and scheduled for release on February 14, 2023, is being built with support for Windows 7 (according to the Nightly system requirements).
Sooner or later, support for Windows 7 will end, but if it has been scheduled, I cannot find the date.
