I switched to FireFox like 8 years ago, but to be completely honest there are maybe 2-3 very important sites that straight up do not work for me at all with FireFox. Like, completely unusable, not just weird graphical issues.
YouTube is an example of a site that Firefox has trouble handling.
Unsure if its a Firefox bug, Google pushing nonsense or uBlock Origin but constantly the YouTube UI Lags, video playback buffers, freeze, etc. Some days its near unuseable on Firefox, but I push through.
> YouTube is an example of a site that Firefox has trouble handling
That's fully on Google. I use plenty of other streaming sites where Firefox handles full-screen video just fine. Coming from the web search company that penalizes the rest of the Internet for slow-loading pages, Youtube is basically an embarrassment and I'm convinced this is completely intentional.
It's gotten so bad that I don't even try to watch Youtube in-browser any more; when someone posts a link that I think might be worth the effort, it goes straight into youtube-dl and I'll watch it offline or not at all.