Feature Request: 1. Quickly toggle thumbnail hide/show feature; 2. Implement "Pin to Toolbar"

[RohitSurwase]

I really liked this extension which I found out today only. But I have been looking for such feature since long.
I am using this extension along with another open source extension https://github.com/craftwar/youtube-audio. So I can use YouTube as online music player.

But it would great if you could port following two features from the https://github.com/craftwar/youtube-audio extension:

1. Implement "Pin to Toolbar" so extension icon can be pinned in Firefox Toolbar.
2. Quickly enable/disable functionality of this extension on click of icon.

Thanks for the extension.

[domdomegg]

Thanks for the suggestion - yes, I would accept a PR contributing this change. Unfortunately I don't have time to implement this myself right now though.