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Doesnt work, people say it wont be fixed. Very sad.
Anybody can recommend replacement that allows convenient playback speed control with ctrl+mouse wheel in x0.1 increments with speed limit at x4 or higher?
Another important thing is control of saturation and contrast. Please help!

The version 3 on chromium based is pretty good, but this is all buggy and bad. Not using again until the firefox version is updated.

I've been using this for years and I finally took the time to look through what this add-on ACTUALLY offers and WOW! Always use this add-on if you love yourself.

Extension is abandoned by the developer.

It's great at increasing the video size... When it works. When it doesn't, there's no button to press that will make it realize it didn't work.

All was fine until I heard that support for Firefox was halted indefinitely. Very disappointed, honestly. Might as well take it down at this point.

I love this extension, and it's my hope you'll reconsider releasing v3 for Firefox. Even if it's a sideloaded release if that's possible (not on AMO).

For people looking for alternatives, "'Improve YouTube'" could be good. Not sure of the features comparing to this but it does offer themes and other customization options!

It used to work, now seems to be abandoned with the dev saying the new version 3 will not come to Firefox. I can say after uninstalling this addon, Youtube performance is much better.