Youtube is pretty much unusable for me after the newest update. It loads fine the first time after I open or restart Firefox but after than it slow down to a crawl and it takes minutes for anything to load when I click on videos and menu buttons. It's not my internet since the website works fine in other browsers and it also works fine in private mode in Firefox for some reason. I tried clearing caches, permissions and anything related to youtube in my Firefox profile folder. I also tried creating a new profile and it does the same thing. The only way for it to work normally is using private mode.