Does what it says. Perfect for tab hoarders that want to go through their tabs in no particular order.

Note to other users: if you hide the tab bar using userChrome.css, you need to unhide it temporarily if you want to move the action to the toolbar. Or just use the keyboard shortcut.

Works great !
But so sad that I cannot map a shortcut on my mouse.
Thie extension doesn't manage shortcut.
Maybe in a next release ;-)

This is awesome! :) Thank you so much for open sourcing it too, I will likely use it as a base for a browser version of http://keeporsweep.net – seeing as you wrote this extension, maybe you are interested in that project too?

Great way to get through all the excessive tabs I open. Sometimes I don't know where to start.

Does exactly what it says on the box. I'm sure I'll find a use for it.

Note: The button is black, so -- EDIT: Looks great in both light & dark themes.