Try starting Firefox in Troubleshoot Mode (disables extensions) to check if an add-on like Facebook Container or ad-blocker is blocking content.

That bug is fixed - update to v150.0.1 (FF menu > Help > About Firefox).

Facebook suddenly does not log on. I complained yesterday and you sent me an email this AM. When I logged on first thing this AM, I successfully logged on after I login in to Yahoo Mail. Facebook worked fine. I usually log into Yahoo Mail first, Yahoo News second, and then Facebook. When I tried to get Facebook to work my usual way, it would not work. In other words, Yahoo Mail, Yahoo News, Facebook. Since I could not get back in to Facebook, after several attempts, on Firefox, I went back over to Chrome, where I have absolutely no problems.