Hi! I have been using youtube and all of a sudden, without me restarting firefox I'm loading a video and it shows this blank screen in place of the reader. The shortcut for full screen mode is not working and other shortcuts don't do much. I've tried some options like disabling every add-ons including Ublock origin and restarting, also disabled hardware acceleration and restarted, checking for firefox updates, and I think that's all I came up with. I tried to do researches online but couldn't find something that looked exactly like my problem. I still followed most of their troubleshooting. As you can see on this screenshot the add-ons are disabled. The rest of the page works fine, even the comments. It's just the video, as if the reader was not there. Also to note that the videos accessed since this problem appeared are not in my youtube history, as if they were never read. Have a good day