Hello your last update 2.3.0 actually broke the whole extension on my end, it doesn't adapt to any dark theme anymore and dynamic doesn't work, actually it seems that whatever i choose in the options it doesn't change anything. I was just browsing and it suddenly went white themed with unresponsive settings.
EDIT : I just tried reverting to version 2.2.0 and it works fine so it's definitely the update.

A nice, simple tab sidebar. However, I prefer Tree Style Tab or Sidebery which have more functionality.

It's really good except for one problem - sometimes, dunno why, greyed tabs (unloaded) suddenly turn normal despite when you click on them they need to actually reload. It's annoying because it waste ram. A solution could be marking multiple tabs to unload them.

Edit: I use uBlock origin

With some customizations, it really brings a native look&feel vertical tabs experience.

Handmade and polished. Thank you!

Боковые вкладки, с локализацией и минимум наворотов, работает и на linux.

Very simple but for this reason perfect.

Very nice and uncomplicated add-on. Works perfectly.

Najlepsza!