Just want to say this extension is incredible. There's an unbelievable amount of features that are so useful, I love it.

That said, the last few weeks I've been getting MAJOR slowdown on YouTube while this extension is active. Any buttons presses or inputs are delayed, sometimes by a full second or more. The issue is alleviated by restarting Firefox but after a couple hours it eventually comes back up. Totally possible it could just be something on my end but the fact that it only happens while the extension is active makes me think it could be a more wide-spread issue.

Still giving this 5 stars because it deserves it, but I wanted to bring that up in hopes that the developer will see it and check it out.