It is the Best sidebar I've ever used. The freedom to customize nearly every aspect is superb, and the default configuration is already super lovely and usable.

5.0.0 works flawlessly. ∞/5 all day long.

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

Takes some tinkering and getting used to, but helped my quitting my addiction to Arc Browser. Should inform users that you must take snapshots if you want to keep your tabs

Thanks for performance improvements with a lot of tabs in 5.0

i come from treestyletab, and this extension is amazing