Just had something interesting.
Using firefox nightly the youtube front page wouldnt load at all but if i loaded a previously viewed video it would work fine. so i did some poking around and figured something out
Firefox nightly 119.0a1 (2023-08-31)
UBlock Origin (the real one by the ramond guy)
if i go into ublock settings, click the filters list, purge all caches, and then update it'll return to working again
might have been a bug but it only affected you tube, at the time time i've had nothing but problems since i got home