works pretty well. The built in firefox autoplay stopped working so this is a pretty good alternative. My one complaint is when you go to the twitch home page after watching a stream it also stops the pop out player.

works even with ublock and twitch element hider extensions active. doesnt block the stream when you go to online channels like intentionally to watch the stream, just vods that autoplay when youre seeing offline channels or the main page stream carousel. if you choose to play a vod on one channel and then switch to another, that channels vod will autoplay unless you refresh the page again. very intuitive and simple, much appreciated