It's almost entirely due to ads, and this exact problem drove me to using adblock after years of avoiding it. Sometimes it just happens in the background at ran

It's almost entirely due to ads, and this exact problem drove me to using adblock after years of avoiding it. Sometimes it just happens in the background at random, and sometimes it happens when loading bookmark groups. It's not really a sufficient solution for me. I'd prefer to explicitly allow tabs to play sound. I believe Firefox experimented with that approach and found users didn't like it, though.