Excellent shit, if only for the stopper as I don't have to keep other addons for that, but the speed adjuster is a nice useful thing when needed.

I love more choices

Nice

Pretty good. Have many needed features.

Was looking for these features for so long. Super must to have Addon.

Amazing add-on, nothing to add to it, got everything!

I strongly echo many comments in this review area.
Maxim, please communicate to us regarding the difficulties involved in modifying "Enhancer for YouTube™ by Maxime RF" ( or modifying a recently compatible extension, in general, to achieve this ).
(( By the way, the following is your website, correct ? :
https://www.mrfdev.com/enhancer-for-youtube ))
so that it is correctly signed for current inclusion as an extension for Firefox Quantum ( a change in security for FF users since one of FF's most recent updates. I have
66.0.3 and about to UD to 66.0.4 in a couple mins.

Thank you for your time and your great extension,

Looking forward to your reply.