Seudev's Video Speed Controller

The slider is extremely difficult to use to control the speed, while the addon does work on almost every embedded video I've found even YouTube... what's worse is when actually trying to reset back to 1x, often leads to being redirected to the addon's developer page. Very frustrating to use.

If I could give 6 stars I would. I had been struggling with my classes until I found this extension. WOW! It's amazing, helped me a lot and I am saving precious time. Kudos to the developer who created it. It's a life-saving resource. I'd like to use it on my phone, does it work?