Yes, there are a lot of settings, but once you understand how to use it, Sidebery is a must-have for Firefox. By adding the use of “userChrome”, I have an even better experience.

Great extension! It helps maintaining many tabs available and organized, without clogging your browser with too many open tabs. The killer feature is that you can save the session (even automatically) and restore it at a later time.
To me it's a must-have extension if your work is heavily browser-based

When I realized I could have multiple tab panels, wow! Amazing add-on, I don't know if I can go back to horizontal now. Great work!

È la cosa più simile ad Arc Browser vista finora, veramente ottima.

When I open it, I want it to default on 'bookmarks' not 'sidebery'. I'm not going to spent all night with my head buried in Settings trying to figure how to change the default.

Started OK, went well for a couple of days, then just disappeared! Re-installed, no show. Forget it, not worth the hassle!

low performance

This extension is incredibly useful. It stands out as one of the best I've ever used, and I've been online since the early days of the Internet. Excellent work, Max Badryzlov! Thank you so much, buddy!

Great!

mate, this add-on is more than an add-on. this should be integraded into firefox. it is much more superior in managing tabs than anything mozilla has made (e.g. firefoxs new vertical sidebar looks in comparison so halfhearted).
i just found out that i can customize the tab menu too (often to unload tabs).
i am really impressed with this masterpiece! thank you very much