Most great! Only thing missing IMO is a shortcut to open Simple Tab Groups in Sidebar (i.e, not having to multiple click to get to sidebar). Otherwise, great - thanks!

Spesso le schede dentro un gruppo si duplicano/triplicano senza motivo

Addon popped up a page stating it crashed or something or other and requested me to load a backup. Doing so made me lose countless windows and tabs that just so happened to not belong to any group at the time

Omg do NOT use this extension. I really do not understand why it has so many starts. Needlessly complex as another reviewer has stated. I grouped some tabs, then opened that group and it cleared my entire window of the tabs I was using! Unbelievable. Who in their right mind thought that was a good idea? I had to disable the extension to get them back. Stay far, far away from this extension if you value your tabs!

Lately my browser is freezing up so much.

Was great till it started to load so slowly that it took over my browser completely for 10+ minutes.

This is insane

I love this add-on, helps me a lot tiding up all tab mess during study. Students, researchers, developers definitely must give a try. One thing! I don't understand why "deleting the bookmarks" after removing a tab group, saving into bookmarks actually is to be able delete the tab group, no?