5.0.0 works flawlessly. ∞/5 all day long.

5.1.1 requires you to turn animations on. neat. 5/5.

Thanks for performance improvements with a lot of tabs in 5.0

i come from treestyletab, and this extension is amazing

I haven't been able to live without vertical tabs in years. This is the best Firefox implementation of it I have found yet.

Just got a big update that improves a bunch of stuff that was already good.

I just discovered that clicking on the tab you're already on switches to the previous one you visited, so repeatedly clicking the same tab switches between the two every click. I have no idea what I'm going to use this feature for, but it feels well designed and I love it.

This extension has helped increase my productivity so much! If you have tried side-bar/tree view extensions and been disappointed, try this one, its so good you will never go back!

The latest release from about a week ago included so many UI and quality of life improvements I felt compelled to write this review. Before, Sidebery was a functional and necessary utility that allowed a ton of customization options, including CSS. Now, it's a joy to use! I discarded all my custom CSS and have been loving the default UX.