For the most part it is great to hide latest horrible Youtube redesign and to bring back functions like frictionless plalist/watch it later use without having to go back and reload the page. But it feels it does something to the video itself and while watching i can feel video looks different than when add-on is not enabled. And it also messes up home page layout and there is no setting to fix it (i see only 2 videos in a row instead of 3 with my size of browser window).

I just downloaded this add on. Wow, just being able to fast forward through commercials, adjusting the play back speed with the mouse, and using the space-bar to stop and start the video are such a game changer. I use Youtube mostly for educational videos (really:), for example tool making tutorials, and I often take screenshots at crucial sections in the video. Being able to go backwards or forwards one frame at a time, so I get just the right picture, is simply amazing. Thank you to the developer.

I am looking for the donate button I saw on the Firefox add on pop up page. This person deserves a donation.

I absolutely love this extension! Funny. Easy. Effective. Works great!

Works perfectly fine with Waterfox too, using 2.0.124.2 on Waterfox G6.0.14 (64-bit).
Manifest needed a tiny edit :)

your extension saved my soul from youtube's awful new UI - THANK YOU!

This WAS an awesome add-on, but not anymore. It ends up making your videos not load, or STOP video, while audio continues. If you're having SERIOUS ISSUES watching YouTube and you have this installed, REMOVE IT!!!

its perfect!!

A must have extension, unless you chat in livestreams, in which case it forces the chat position under the video, makes no sense, has been broken since most recent update