Had to revert back from the new 2.0.1 version. Granted I have multiple windows with a few thousand discarded tabs, which is still manageable. After the update, the interface dramatically slowed down, even affect speed of other addons likely due to much increased CPU, very delayed display painting in the manager window. Selecting and moving groups of tabs is slow. Lost darkened highlight of the active tab in a window, probably related to the not really needed lightened box background for each window. Didn't check if one annoying bug was fixed where selecting a tab in a tall list one jump the screen like there was an anchor point. Was too distracted by the negative changes. So, for now sticking to the previous version unless I hear of massive improvements, but this ain't it even though I very much would like to see improvements since I don't really like how other addons try to tackle the same features.

😄😇🥰😎 SUPERB TAB & WINDOW MANAGER! Non-destructive way of sorting and managing tabs! 9/10 😄😇🥰😎 REQUEST: #1. Please add way to filter by domain, so shown in groups by domain.tld! Check "Tabbie" by '010 Pixel' for how useful it is! #2. Plus need easy way to remove duplicate tabs by matching URL/path or URL/path and &'s. #3. Cannot sort tabs by age to review and close old projects, research etc. THANK YOU!

It's nice that it supports dark theme but the dark icon is hard to locate on a dark toolbar..