Your comments

2017 - still very sad, that this feature is missing.

Sure, the usecase is as followed. In Tabs Outliner it is much more convenient to select a lot of tabs and reorg them, than doing that in chrome with different windows etc.

Also, if you can do that with one tabs, its just logic that you can do it with mutliple ones.

Fi. you want different tabs reorg in a new window or group in Tabs Outliner ...

BTW: Your created an awesome tool. The best out there!