I created this profile just to give 5 stars to this add-on. That's how good it is.

Would be worth it only for the scrolling through tabs part, but it has so so much more to it. Great for keeping tabs organized.

I'm under the impression that this is the way Firefox's vertical tabs should work.
Certainly, not for novice users, but maybe simply an optional "Advanced Mode" or something similar, that we could just enable from Settings and then have this kind of extremely versatile and powerful tabs, groups, etc., tools at hand. (Tabs unloading!)
Still learning it and day-by-day liking it more and more.
ShyFox theme and Zen Browser seem to use Sidebery natively.
Sidebery is just glorious. <3

One of the main reasons why I just recently switched (at least for now) from Edge to Firefox / Floorp. I like it better than the vertical tabs feature in Edge. More compact and more features. Thanks

As close as I can get to mimicking Arc on Firefox

This extension is really useful

Sideberry makes tabs slick as hell. I appreciate the ability to use a custom font (determined from Firefox defaults I think). Running Sideberry along with the mod to remove default top tabs, plus the add-on 'hide-scrollbars' adds so much space to the screen and feels super clean. Make sure to go through the settings to suit your preferences, using the option 'Switch tabs with scroll wheel' is so convenient!

An absolute must have and the first extension I install on every firefox-based desktop browser. Tree-style tabs are the future. Snapshots are also revolutionary. Being able to save your settings customisations is a timesaver as well.

Moved back to Firefox from Edge so I could have tabs on the right. Crazy, I know. But Sideberry makes it possible and so much more. 🌟