What version of Firefox are do you have? FF is currently working for me but it looks like there is a new release queued up.
I was upgraded to Win11 in January, without my consent I might add, and I made the mistake of not undoing it before the 30 day roll back period. After 30 days, you cannot roll back to Win10 without a clean install. 🤬 My PC went from literally (and I do mean literally) booting up AND opening a web browser in less than 10 seconds to a couple of minutes. BTW, the 10 seconds included time for me to type in a pass code. I made the mistake of trying to figure out what conflicting driver or software was causing the problem instead of just rolling back and did not realize that after 30 days you are stuck. I never found a problem and for a while I suspected a virus or other malware but found nothing. The boot up has improved over time, though not to the 10 mark, but occasionally I still get a long boot up. I am once again thinking about a clean installation of Win10 but making sure everything is backed up and reinstalling any software is a PITA. In hindsight, I wish that I had simply rolled back to Win 10, immediately.
--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.