The extension would suit me better if it only showed the tabs for the current window, instead of across windows. I use Window's multiple desktop feature a lot for context switching, but that means that when I'm in another browser instance it shows tabs I'm not interested in.

Possibly make it a setting since it seems others don't mind how it is right now (don't see any other issue/request). And is possibly quite easy by adding the correct option to browser.tabs.query.