Not sure when this started, but this add-on seems to prevent videos from beginning at the correct time when there's a timestamp in the YouTube link. i.e. If you go to a link that says https://www.youtube.com/watch?v=[video]&t=574s, the video will just start at the beginning instead of starting at 9:34. This problem went away as soon as I disabled this add-on.

Everything works fine in the new versions for me. Great work!!! And thank you for this excellent extension (Very happy) - donated.

Расширение супер, очень доволен, мне безумно нравится, что здесь есть много гибких настроек на любой вкус:) Спасибо, это реально шедевральное расширение, 5 звёзд заслуженно!

I've already use this extension on Chrome for years.
This add-on provide a lot of features, my best recommend is boost volume. Besides, it also have many great things for you to discover

SUGGESTION: Some videos have terrible audio quality because they play in only ONE HEADPHONE, giving users a headache. If a feature were to be added that changes the sound type from stereo to mono, this extension would be a miracle!

VERY nice

a must have add-on for firefox users

Great addon

feature request: setting that when turned on will skip back a set amount of time when you unpause

Génial, fonctionne du feu de dieu. Un des meilleurs modules FireFox.

I am at a point where I can't use youtube on other browsers because of these missing features. However since the last big update the auto expand feature does not always work, I'd say once every 3 to 4 videos I have to manually expand the video to fit the entire screen. Also, the buttons are transitioning very slowly (3-4 seconds since clicking until something happens), sometimes they stay folded and the three dots do not appear at all until refreshing the page.