Periodically completely kills performance on websites that don't even have a video in them. At least there's a blacklist feature.

Exelent

to anyone saying the extension Is sketchy because It requests your data, this Is a basic permission even the most reputable addons ask for and need to function.

Works great for my purposes. I'm able to follow a LinkedIn Learning course thanks to the app. The presenter goes way too fast. LinkedIn allows 50% speed, but that's too slow. 80-90% is super helpful. I had to increase the opacity on the controls to see them when I press "V". The UI isn't super slick, but it's well thought out.

Wish there was a way to set up additional keys, for example Ctrl+Scrollwheel Up/Down

The functionality of the plug-in is great, but performance is unfortunately awful.

Admittedly I am a person that regularly has over 30 tabs open at once, and noticed Firefox's general performance drop when open for long periods of time to the point of requiring regular browser restarts.

I've had no performance issues after disabling the extension, so unfortunately will give it a low rating.