[qu4z-2]

Youtube is the worst, because not only does it autoplay, but for the first 2s or so it's faffing around with JavaScript so no matter what you do in that time it will subsequently start playing. Like, it'll show up as "playing" and you pause it, then leave the tab, and like a second later the video will start despite your having paused it.

(for the record, at least half the time I open a youtube video I don't want it to play immediately)

[sincerely]

i'm not sure if this is something on my end or google's, but i've noticed that in the past few weeks whenever I open a youtube video in a new tab (staying in the current tab), it won't play until i switch to the new one.

[zaarn]

Firefox definitely does this, though it doesn't stop autoplay when opening youtube on a new tab (I'm okay with autoplay on the same tab, ie directly navigating videos or autoplay function in youtube itself.

[qu4z-2]

I've noticed that too, and it helps, but I tend to navigate with Ctrl(+Shift)+Tab, so eventually I'll briefly skip over it and it'll start playing.