When loading some pages, after the latest update to Firefox, I noticed that many websites started, loading slowly or waiting for other content requested by scripts to time out before continuing to load the content of the page. Some taking 20-100 seconds to throw an http error/timeout in the network tab. I even tried it having all my extensions disabled, vanilla FireFox and I still have the above issue. The only fix I have now is using uBlock or some other plugin to block the url's of resources that are not loading or have been timing out. One such website/url being cdn.cookielaw.org has been the worst making it seem like some websites were straight up broken and unable to load. Anyway I have fixed this issue by doing the above and blocking the urls of content that doesn't load but I don't think this is intended behavior as I can't reproduce it on other browsers besides FireFox.