Criminally underrated... It's the best all-in one add-on for youtube in the store. Everything fits perfectly!
Also, in most add-ons you can tweak the volume but it sets the playback speed to default and cant be changed while using it. So I think it's syncing with the changes here.
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The only issue i have is that if the header is set to hover, it creates a gap between "suggestion categories bar" and firefox address bar. I hope in the next update either both will be hidden or the suggestion bar will be replaced with the header while hidden.
And maybe there will be a dark mode for the add-on as well.
Another thing is, maybe this add-on isn't marketed quite well. It took me a while to find it. Should have been the top search result.