Very good extension. Especially Useful for listening to lectures.

Works great for me! Shortcut button is nice to have. And the only permission required is to access youtube.com data. Thanks for the great add-on Navi

Auto-toggle nice

Cool add-on. I noticed it doesn't work on live videos (doesn't show the new button and the shortcut key doesn't work). Is this a known limitation or could it be something related with my specific configuration? Also, if I use the old youtube interface, the top bar (with the YT logo, search bar, etc.) overlaps the full-screen videos, but I doubt that this will affect many users as it's getting harder to disable the material design UI/polymer framework. Thanks for the add-on!

"Auto-toggle" is not enabled for other video pages after switching to "normal" mode.
P.S. By the left mouse button - yes. Opening a link to a video with the middle button does not save the settings, and I open it often.

The ` does nothing. It's touted as a great feature, but it doesn't work for me. I'll upgrade my review because it does work with the icon, and the fact that the developer responded right away to my review shows they are trying.