This morning youtube pages stopped working for me in Firefox. Sometimes the page doesn't load at all, the loading icon on the tab just spins for a bit and then quits. Sometimes the page loads, but the thumbnail doesn't load and the video won't play. When I click the play button and the loading icon on the youtube video just spins indefinitely. The videos play fine in other browsers. I tried playing the videos with Firefox in Safe Mode, after clearing my cache, cookies, and browser history, after turning off hardware acceleration, and none of these worked.