Seems like this extension has access to all websites on Firefox unlike on Edge and Chrome, and I don't like this. I am not sure if this is something to be blamed on Firefox or the extension, but it should not have access to all data on all websites since these types of extensions will be ran on a handful of websites. Uninstalling it now.

Works very well and stable. First I used it to watch youtube videos at speeds higher then 2x. But now I also use it on many other sites and this extension became one of my "must haves".

Life changing good extension, the keyboard controls are great ('R' even allows to toggle to last played speed!). I had to restart firefox for it to work (ubuntu)

plz. add swipe control

Useful enough to be essential.

Very very good!

Very helpful add-on. It has only 1 bug that is It reset playback speed to 1X when page get refreshed or new video is selected to watch on the same Tab. Please fix it.
Overall BEST add-on.