Update 2022: The new default behavior is to show a menu popup when you click the addon button instead of the "manage groups" overview, and I cannot find a way to switch it back, making this addon much less useful to my workflow.

To the developer: It would be amazing if you could add a toggle in the settings that would make the addon button in the toolbar immediatly open the "manage groups" window instead of opening the popup.


2018: It works wonders, and is a great replacement for the pre-Quantum tab group add-on.