This single extension is the only reason I am not switching to a chromium based browser. True life saver. Right now I have about 830 open tabs in 11 different groups and, thanks to STG, zero trouble handling them. I specially love the hiding other groups idea.

Аддон прррросто бомба! Разработчик шикарен!!! Плагин решил мою потребность в организации вкладок на 100%! Благодарю от всей души!!

Works great for me to organize tabs to view later and bookmarking the site doesn't make sense to me. It also has container support which I may try later.

Works flawlessly! My only complaint would be that it's a little slow to startup on HDD-based systems, and prevents tabs from loading content until it's finished "warming up" (which can take up to 30 seconds)

Excellent! It's a must-have for daily usage!

The most important addon to keep me in Firefox!

gd, used for years