One of the main reasons I choose Firefox - this makes it easy to maintain separate workspaces for different projects, and to keep track of a lot of tabs. Incredibly useful

very unreliable extension at ff 57. At previous versions it worked better.
After initial opening of browser at some of windows it shows "loading" indicator forever. And it's possible to move between tabs with keyboard only at the window. Sometimes it loose list of opened tabs at sidebar, though they are accessible via keyboard.
Also order of tabs is broken sometimes for keyboard.
I tired to struggle with it for 1 month. I give up now.

Very nice, but can't see bookmarks in vertical also. See to Vivaldy layout, two vertical spaces, one for tabs and the other for the bookmarks. If only I could have a shortcut to switch from one to another, at least the lack of seeing both columns at the same time would have less impact.

For years now, trees are easily malfunctioning: many kinds of positional/branch errors or even sticking to a place for no reason.
There should be option for no animation after reordering was requested.
No "unload tree" button exists, not sure if possible.
During last month, a couple of tabs got not clickable, requiring use of keyboard to navigate/close.

10/10 !

to hide the usual tabs, and to hide title bar of TreeStylTab

[your firefox profil folder] /chrome/userChrome.css
--------------------------------------------------------------------
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

#tabbrowser-tabs { visibility: collapse !important; }

#sidebar-header {
display: none;
}

Great when juggling multiple tabs. A must have! Easy to use without any issue at all. 5* from a satisfied customer.

Почему после закрытия панели, перестаёт работать инверсия открытия вкладок!!!!!

This extension has changed my life. My work can involve juggling many web pages, whether I'm maintaining issues in JIRA, Writing pages in Confluence, filling in timesheets, or any number of other things. So many mistakes used to happen when I had 3 copies of the same page open at the same time and editing content in 2 of them at once without noticing. But no more! All my pages are now organised in a way that actually mirrors the way I'm working. This is a browser extension that makes me smile! :-)

VERY Useful! I just wish we could change the look and feel of the sidebar, have thumbnails, and have it Support (as in group them accordingly to...) Mozilla's Multi-Account-Containers. (See https://github.com/mozilla/multi-account-containers/#readme )

This is one of the extensions I can't browse without after trying it for about five minutes!

It's just perfect for maniacs like me who tend to have at least a dozen tabs open at any time. Especially at work where I like to have the complete trail of websites visited while researching the latest technical problem(s) available and organized.

Very useful: With this extension I get a better overview of my tabs. The only thing I miss is "Custom Tab Groups". For example: Work, Personal, Programming, Todo, etc.

Thanks for this addon!
I really like the native tab bar, but I also like how Tree Style Tab groups related tabs together. So I created an addon based on this addon that colors the native firefox tab bar based on the group the tabs are in.
https://addons.mozilla.org/firefox/addon/tab-groupcolor/ (please don't break the dependency :))

First: If you think the add-on doesn't work, press F1 or click the "Tree Style Tab" button that appears. The options page tells you this, but we all know people are too impatient to read the manual and expect everything to be done for them instantly.

Due to current limitations with WebExtensions (in Firefox 57.0.2), this add-on can't remove tabs from the top of the screen, so the user has to do this themselves by modifying their userChrome.css file. There is a post on the Firefox subreddit detailing how to do this, but I would like to see this guide included or referenced in the options page until such functionality can be added to the WebExtensions API: https://www.reddit.com/r/firefox/comments/736cji/how_to_hide_native_tabs_in_firefox_57_tree_style/

Caveats aside, Tree Style Tab is still an exceptional organizational tool for anyone who has a habit of opening new tabs for everything. With the tree organization, you always know which tab opened from or is related to which other tab, and the options for how you want the tabs to behave are extensive. The only faults I can find have to do with limitations of the new add-on engine, so I can't think of any reason to deduct stars. Great add-on, essential to how I navigate the web.

I have firefox 57 and the add on doesn't work

Suggest: if it's not possible to auto-hide the TreeStyleTab-Sidebar, would be great showing the tree in a new window, like the Bookmarks Manager window.

Nice integration in FF57 !

Can you add a configurable keyboard shortcut so we can fast switch between bookmarks (CTRL-B) and Tree Style Tab (CTRL-something) ?

Is there any way to save a Tree Style Tab session and get the tree as identical when loading it ? When I use Tab Session Manager the tree is lost :(

Thanks !

Amazingly useful addon. Makes tab management so much easier that I couldn't use a browser without it.