Favorite add-on for Firefox so far!! Love the feature that keeps a video from playing if I'm not looking at it. Another fun one is when the video comes out while I scroll the comments.

So far so good

Essential, the best of the add-ons for YouTube that I've tried

Ultimate YouTube extension with lots of options...

great shit, enjoy it

Funktioniert tadellos,... topeinfach, einfach top! ...

love this app great having videos start playing full screen right away and in full hd

Great add-on that does exactly what I want from it!

mouse wheel volume control

If you are using Firefox and YouTube then this is the one extension that you should definitely grab .