Same here. Firefox and chrome had problems with facebook, insta, crunchyroll and more
Comet from Perplexity works.
Edit : The problem is by no means new. It’s ancient. There are often massive problems with Facebook, Instagram, and YouTube.
It hasn’t been as bad as it is today for a long time, but there are always !!! minor problems all few weeks. uncheck the QUICK/HTTP3 is the fix here for me too.