Another data point: I haven't had any of these in Firefox on Linux (Kubuntu) except for occasional crackling audio. For me, that happens (I think) after a non-

Another data point: I haven't had any of these in Firefox on Linux (Kubuntu) except for occasional crackling audio. For me, that happens (I think) after a non-playing video tab sits there for a few weeks, and I can fix it by restarting Firefox. I have ~800 tabs open.