[dguo]

In my experience, watching videos (YouTube, Twitch, etc.) for longer than a few minutes frequently causes Firefox to overload my CPU and bring my entire system to a crawl.

That is the only major issue I have with Firefox. I still use it as my main browser. For one thing, container tabs are a killer feature.

[extra88]

I don't think most experience what you do with video in Firefox, I wonder if you have hardware acceleration disabled.

I was interested in Firefox containers but quickly lost interest when I discovered Firefox Sync doesn't sync container configurations, I wasn't going to replicate them in multiple places.