This is awesome!
I was looking for something like that ever since I gave up on Google Chrome.

I did not face the broken audio problems other users reported. Maybe an improvement was pushed in latest updates. Of course the audio gets a bit weird when speed is changed, but the "added audio weirdness" is compatible with what happens on the built-in YouTube speed change.

Transpose works like a charm.

The loop tool with multiple loops with labels is great!


Suggestions:
* Option for continuous pitch shifting (to adjust songs tuned with A=432Hz to A=440Hz, for example).
* Either an option to pin the "pop up" on screen or to have it embedded under the video. (When I am playing with the extension and wanted to adjust the volume, it disappears and it is mildly annoying not being able to keep it open while I click through the page).
* I don't care for the tuner and chord library. Not sure if many people will use those.
* Metronome without automatic beat detection/sync or at least tap tempo and offset adjustment is not really useful.

速度を1%刻みで変更できたら更に良い。