Works perfectly. This is my 3rd updated review, as the developer has been wonderfully responsive and has made some hugely useful improvements to this project. There is only 1 single issue I currently have with this add-on, which if resolved will earn this project 5 stars: For the longest time, I have thought that the "add new group" button was not working, as no matter how many times I clicked it, a new group would not appear! I discovered what was going on. New groups were appearing, but they were appearing BEHIND the groups I already had, so I couldn't see them! When I finally figured out what was going on, I had probably 100 empty groups I had to close. New groups should be brought to the front to prevent issues like this. It would also be great if the feature in the old Tab Groups app of being able to double click on empty space within the groups window would open a new group was added. Otherwise, wonderful job!