[flexd]

My Firefox does this on Windows. I have no idea how many tabs I have open, but regularly the whole YouTube tab I have open freezes, especially if you try to watch one video, and then another, and the whole UI is delayed by many seconds. Even closing the tab will have the audio playing for several seconds in the background. It's not due to load or hardware as far as I can tell. The videos play just fine in Chrome or Edge. I still use Firefox as my daily browser (previously Chrome), but these issues are super annoying. I don't want to have to restart my browser or PC all the time. I don't know if it's some combination of extension/ad-blocking or YouTube doing stuff, but it's very annoying.

Unrelated to that, but on a Ubuntu laptop I have Firefox tabs regularly stop working entirely. They just won't load anything, and the only fix is to open a new tab and that loads fine most of the time. Other times I have to restart Firefox. I've tried searching for others experiencing this problem and even asked in Mozilla channels on Matrix, but even then I didn't come up with any answers. The laptop's hinge broke last year so I haven't used it since then, so likely never going to figure out what was going on.