This new web extension is really disappointing and lacks the features of the original add-on.
I can't have both bookmarks tab open AND tree style tab open at the same time, which is a big letdown for me.
I can't close "all child tabs" at once anymore by clicking on the right click menu.
Can't close multiple tabs at once with a simple middle click on it as it always asks if I want to close multiple tabs before, which previously didn't for middle button.
When I close a tab, it tries to get the focus to the one under it (hence loading it), instead of the parent tab, and only half loads them (so that they remain buggy forever, until reload)
Also it doesn't work well with SNAP Links Plus, which, for some reason, creates useless temporary tabs with some weird indentation.
A lot of options disappeared from the add-on as well which makes it look like a watered-down rip-off of what it used to be.

EDIT :
The behavior of this add-on changed for the worst in the latest patch.
It now auto expands ALL the children and ALL their descendants upon tab selection (and not just those that were expanded before, like in previous versions)

There's no way to revert to the previous behavior and it's really annoying to have those huge FULLY expanded threes I didn't ask for.

Vraiment pratique et complet avec les addons TST. bravo

This is an awesome add-on.
Especially if you keep like 200 tabs open. It allows to organize them in a simple way.

Dear Piro, I really need your help. Last version of Firefox seems to lose internet connection when TST bar is open. I know how strange it sounds, but I confirmed that on two computers already. Having TST installed does not break anything, but if you open the sidebar, connection disappears in the next minute. But the second I close the sidebar connection restores. I will check if the issue persists if I disable other add-ons.
Please get in touch at vwa8ypaq65ts@mail.ru. I would really hate to uninstall TST.
Thanks,
Alex.

This is the best add-on on firefox. Everyone's lives would be better if they used tree-style tabs. I am a tree-style tab evangelist and the add-on is the primary reason that I use firefox.

Tab power at your finger-tips

Tree Style Tab is the main reason Firefox has been my default browser for the last several years. It is hard to believe that Firefox--nor any other browser from Chrome to Edge to Opera contains native support for these style of tabs. For any user that like to have more than 20 tabs open at a time, I find this to be essential. Absolutely the best browser feature, I just wish I could figure out a way to make a monetary donation to the developer!

Great addon! Without Tab Groups it is a lifesaver when working with lots of tabs.

All the issues have been fixed! Flat out, this extension is the main reason why I use Firefox, I can't stand Tabs on top; they are a mess when there are more then 3 open tabs! No other browser handles tabs on the side well. Chrome's similar extensions are all horrible. Edge and Vivaldi don't handle "tab children" the same way and you can't tell what tab a new tab is from if you do "Open in new Tab".

And then add in all the other addon Extensions that Piro has made for TST, it can't be beat.

I utterly fail to see why this sort of thing isn't just an option for ALL browsers. I guess it just shows how technical of user I and others that need something like TST are.

ko

Best of the best. I was looking for something similar, very pleased with the result. We just have to wait to hide the tabs at the top ((
upd'2024: ... and search in opened tabs by caption please ))

tes

This works pretty well. They way the hierarchies work is great. My only complaint is that the hierarchy structure gets lost when I close and reopen the browser. I have found a session manager that handles this so I wish it could just be added into Tree Style Tab.

Tree Style Tabs is definitely the best way to handle having a lot of tabs open at the same time.

My favorite and most used Firefox plugin. Increases my daily productivity and ease of mind significantly. Also the main reason why I stayed with Firefox for years (even though Chrome was and is very tempting). The overhaul update of this plugin which now supports Firefox full screen mode on Mac OS and got rid of all other bugs I noticed before is stunning! Love it!

很喜欢这个扩展。