Love this addon! I want to contact the creator to tell him about a bug. When you close nested tabs you get a warning that you are closing multiple tabs and you can click a box to not warn you again. No matter how many times I click that, it still warns me. I had to turn it off deep into the settings of the addon.

This extension is very useful for being productive!

This plugin is fantastic! Took some time to get used to, but this is such a superior way of organizing tabs! Just be careful not to build too many, since it's effective at doing its job lol

Tree Style Tab de Piro (piro_or)

The only and best way to have tree style tabs! So useful! Thanks!
Lucadeparis

use it for years, amazing tool, not only to show it vertically but allow you to fold pages related to a topic.

It automatically closes parent tabs sometimes, and it is really annoying

A colossal improvement over the standard tab bar.

Frankly, it's long past time we collectively killed the standard tab bar for good. The standard tab bar disgusts me.

I wish someone would make this for Android Firefox.

E: 5 yrs later, this is still say half of the reason I use firefox instead of chrome