Noté 5 sur 5 étoiles

Work well with firefox 51.0.0

Noté 1 sur 5 étoiles

Didn't work in my FireFox 34.

Noté 4 sur 5 étoiles

It works with Firefox 26.0, also with Youtube Center. But there should be an on-off switch.

Noté 2 sur 5 étoiles

it doesn't work in my firefox 25.0.1. scroll and video window goes out of view

Please feel free to contact me on Support E-Mail mentioned on extension's AMO page. I need to understand why it is not working for you.