All the right features. Saves precious screen space and my time.

ok

Well, it's the best work around so far until a true tab-grouping add-on is developed for FF 57. It's the whole reason I use FF. Wish you could label the parent tabs something else than the parent website. For example, "Everyday Stuff" or "Suppliers." We have several suppliers and different types of suppliers so it would be nice to label each Tree like the tab groups of 56.

The previous version had exactly what I was searching for, meaning the ability to group (and collapse) tabs together while remaining at the top like the default tabs.

I am using half-width windows all the time, so the side bars take way too much space for me, so sadly I had to disable it once firefox forced its update and new plugin versions on me, but I am still hopeful that one day it will give us that functionnality back.

My favorite plugin by far! Always updated even for Firefox 57.

удобно

Update : there is a companion extension that supports scrolling among the tabs using the wheel of the mouse: https://addons.mozilla.org/en-US/firefox/addon/tree-style-tab-mouse-wheel/
Therefore the Autohotkey solution is now obsolete.
------------------------- old review -----------------------------
One more 5 Stars and a bigup for Piro!

I really like to be able to scroll the tabs in my Firefox. Since v57, it's not possible anymore, so here is a solution found on the"Tab Wheel Scroll" extension page :

1) Get Autohotkey
2) Create the following script:


#IfWinActive ahk_class MozillaWindowClass
;MouseGetPos, [OutputVarX, OutputVarY, OutputVarWin, OutputVarControl, 1|2|3]
~WheelDown::
MouseGetPos X, Y
if ( X < 205 )
SendInput ^{PgDn}
Return
~WheelUp::
MouseGetPos X, Y
if ( X < 205 )
SendInput ^{PgUp}
Return

And run the script whenever you launch Firefox.
You must adjust the X value ("205" pixels in my case) to the width of your vertical tab.

Great extension that allow me to easily manage 100+ tab

the main reason I Insist on using firefox.おつかれさまです

Very good and Tab Search will make it better.

This extension is great for me who keep open many tabs and it helps me keep being productive by organizing hierarchically my browsing, I cannot do without anymore, no equivalent for chrome. The new version integrate well in the new Firefox (57), but it's less useful with the top bar staying still and the title. I solved it with userChrome.css, but it's would be easier with an option for the non-technical user. Great work and thanks a lot !

This extension would be perfect if the author could hide the children tabs from the top bar tab so you would have only the parents on the top and the children on the left, a superlative UX tweaks!

It's working well.

Very good and useful.

I'm very glad Piro had a revised version of Tree Style Tab for the latest major revision of Firefox. The user interface has changed, and functionality is somewhat less, but the core features remain present.

Anonymous user 097179 ty for great explanation!!! Now all works right for this great extension!

Been using this addon for years now, and tried a few alternatives, but nothing ever came close.
The developer Piroor is also very active on his GitHub.