This extension is the update of the video speed controller and is really good.

Please come with android support

The addition works, but is sensitive to both case and keyboard layout!

I have Windows 10, a comment from someone who has Windows 11 was written earlier, is it possible that you have the same problem?

Previous similar additions did not require anything like this. Pressed Caps Lock, English layout - keyboard controls do not work!
Constantly switching to a keyboard layout that is not my native one to watch videos does not appeal to me. It is possible that not many non-English speakers will understand this problem.

This is awesome!
Enables fine-grained change of the playback speed in all audio or video elements.
Improves the original plugin and does not break the onratechange event so it may be used by other scripts.

Great job done by M.A, it works perfectly in my FF while offering more advanced functions than the popular one. Just wanna say thank you!