Sorry for my English.
Please make it possible to permanently pin the control buttons. It would be better if the actions were performed in one click, but not hover to show buttons, move cursor and click.
Please make it possible to disable the mouse wheel speed control when the cursor is on the speed button. When I scroll through the page and the cursor hits the button, the speed changes. Very uncomfortable.

Так то полезный аддон, но Stop Autoplay очень криво работает, открываешь несколько страниц ютуба, ставит на паузу, переходишь на какую нибудь, нажимаешь воспроизведение... а через секунд 3 опять ставит на паузу...
Этот аддон идеально ставит на паузы...
https://addons.mozilla.org/ru/firefox/addon/stop-autoplay-youtube/

Love the functionality this add-on provides (especially the custom themes and ad block are great), however sometimes it freezes the tab. Happens about 3-4 times a day with admittedly very heavy use, so it's bearable but nonetheless annoying.

I use only the boost audio and loop button, with this settings, it's really odd to have just two button on the bottom of the page, it would be better to add it on the player toolbar itself !!! (or like the "maximize video" userscript from icycat (冻猫) = attached on top right of the player and visible on hover only)

Overall good, so far. will be testing for myself. the fifth star is in queue!

Nice

good job, thank you

Works well, except volume control doesn't work until I refresh the page, or switch to another video.

would be nice if you could add an option, to show the rating (in percent) of a vid under the thumbnail. the rest is nice

add classic youtube design theme

nice tweaks for youtube. but that background tabs really wont stop playing u need extension background playback fix.