Hi there, I have recently reinstalled my windows, and kept all firefox data so i can move them over, my acc is synced too. I have noticed that when i try to watch live streams on youtube the vidoe works for 1/4 of a second and then goes into endless buffering, i had this on 2/5 different youtubers, however when ive checked different streams they were working totally fine. Watching live streams on twitch is 0 issues, all works totally perfect. Today i wanted to subscribe to one youtuber and it comes up as unable to subscribe due to session expired, and below is sign in, weird thing is i was logged on so not sure what the problem is. I have even removed all appdata folders related to firefox, switched off sync, did fresh install, and same streams did same thing, to add i was not even logged on to my google acc. If someone can help me out here it would be GREAT!!! PLEASE :)