Install it, customize it, and forget about it. You'll come to think that how you have it setup is just how Youtube is supposed to be - whether it be colors/looks or functionality. The auto-theater mode, however, is my favorite feature, followed closely by the speed controls. Never had an issue or conflict with Youtube or Firefox.

Very good to hide YouTube's unnecessary parts—watch the video directly, without related videos or any other visual distractions designed to keep you there all day without noticing.

Excelente

all these features and still no subtitles

why does mozilla and its extention devs not care about accessibility for people with hearing or attention issues

Update suggestion: I wish i was able to load the full content of the video without rebuffering, as i see some extentions on chrome does that.

ignored this addon for years underestimating how impactful it would be. It is masterfully programmed/designed and is a substantial upgrade to default youtube settings/view

Love YouTube but hate the clamour of ads.
And it's July 2023 . . I'm still loving this extension.