Great addon. I dont know about commercial on Youtube anymore :3

great

Наверное, лучшее расширение для YouTube под Firefox

One, if not the best youtube extension, it's very useful! recommend it!

Very good add-on. Does what is promised and has never caused any problems.

Simple and powerful tool. Recommend to all who is looking for an youtube addon.

Brilliant add-on, hav enever found any bugs.

It works well can outperforms all other similar browser extensions. It's really nice to have it for any user. I hope for a bright future for this extension.

Great add on for youtube, makes it much better. I love it.

Great Extension.

I had more than 5 Youtube videos in background, paused (all of them pages waiting to be loaded after Firefox restarted). I had one in foreground, paused too. Suddenly, One of the tabs in background started playing and pausing and playing as the video in foreground played till the video started loading. Something is not well with this add-on.