There's a rare incompatibility with Simple Tab Groups (->STG).
When saving a session in STG, the tree structure of Tree Style Tab (->TST) get lost completely and as a result the stucture is gone.
This happens on :
Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0
OS Linux 6.1.0-7-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.20-2 (2023-04-08)
OS Theme
and is a quite new problem.
Unfortunately I have no real idea how to check, which of both AddOn's produce the "error"...
Does anybody have an idea?
BTW... the rating will be reset after solving the issue, because I know this AddOn since a long time now and used it many times... sometimes in the past though it came to my attention, rhat there were some incompatibilities from time to time - that's why I post this message here and in STG.

Consistent with the host, but lacks functionality that http://addons.mozilla.org/firefox/addon/sidebery provides.

waarom duits?

It's massively hyped by that one tik-toker. The downsides with using this is that it makes your browsing space smaller. In addition, if you're an impulsive person and accidentally close one browser, then you can wave ALL those tabs gone because your never going to get them back. Also it's a massive hassle to group tabs like this, but the upside is that its easy to keep control of tons of tabs.

Takes up too much screen space, when not working with browser window maximized. Please add a feature to auto-collapse to the left or right when not in use and auto-expand the toolbar while hovering over it only.

Thanks for all the features included so far. Cheers!

this addon has the right idea, but i need to be able to save sessions with ease like "tree tabs" allows me to do. also the way that extension has groups that I can select and hide the rest of the categories of stuff I have open is simply the better way to do things.

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

Great addon, but not sure why the Plain Dark theme was removed, was a perfect match for my dark browser theme. Had to revert to an older version.

Absolutely brilliant -in theory. However the inability to rebind the F1 hotkey (which I use for terminal dropdown) makes this addon uncollapsible for me.

Firefox v. 73.0.1

I'd love to give this five stars but I have one major problem and one suggestion:

*I've found TST crashes the browser pretty reliably and Firefox can't restore my session. I'm a serial tabber so losing 100-200 tabs that I accumulate over the course of a week or two kind of kills me. The only thing I've found that might be helpful to users/in troubleshooting is that TST crashes far less when only one window is open. I'd say it crashes every 15 min - 2 hr when multiple windows are open but less than once a day if only one window is used. Also, one window only is far less likely to wipe your session.

*Search function: Again, as a serial tabber, I'd love a search function to find a tab quickly. This is especially true since crashes often wipe the session. opening all the tabs again, combined with the nesting feature - I think it'd be very helpful.

THANK YOU for creating this extension. I hope I didn't come off as ungrateful with my criticism. Only trying to help. Cheers!

Très bonne addons mais très gros problèmes de perf

First to say, I would like to give TST 5 stars, but with
a) Missing Search Function (more to that later)
b) Missing Savestate Function (more to that later also)
it cannot have more than three.
Unlike User Coolvibe, I have no problems with TST for more than a year. I have always about 900 - 1000 Tabs open. My OS is Win10 x64 with 16G of RAM, and pagefile is off. After a restart, it takes about 10 seconds to initialize TST icons, but with that much tabs it is ok. I would recommend to anyone who works like me to run process explorer to look at the memory consumption. If it reaches the maximum, which is easy in Firefox by changing between Tabs, FF becomes instable, and Tabs will begin to crash, maybe due to my deactivated pagefile.
I think that FF needs a lot more memory with TST, and maybe user Coolvibe is on Win32, which isn't really suitable anymore for some applications, FF included, because the devs do not care very much. I have on another machine a 32-Bit FF on a 64-Bit Win10, and it isn't as stable as the 64-Bit-FF, so maybe Coolvibes' problems are from there.
To paragraph a)
That is a very arrogant behavior of the TST devs to say on their page THAT REQUESTS FOR A SEARCH FUNCTION ARE IGNORED. Why ? The Opera/Chrome Sidewise has this. I am eager to know why a dev spends dozens of hours for a sophisticated program like TST, and refuses the most useful and simple functionality EVERYONE needs. I know people who are constantly using 2000 - 3000 Tabs and would be VERY HAPPY to have a simple search button. And NOT by installing ANOTHER addon that needs permissions to this and that.
To paragraph b)
A SAVESTATE Function would be very helpful in case of a heavy FF crash (that happens sometimes) or migration. Where tree informations are lost together with all open tabs. I use Tab Session Manager, but sadly, it doesn't save the TST tree informations. At least it didn't the last time, so my restored tree was completely flat, and I had to spend an hour or two to make new indentations (remember, 1000 tabs...).
Conclusion:
TST has a lot of useful functions, it grew from nearly crappy to very stable and relieable during a short period of time, but the focus went off a bit from real usability to functionality overload. I couldn't even find a SIMPLE function to give the active tab a special color. Maybe I'm too dumb or too impatient. But there are even several addons that are extending TST, and they do not fulfill the aforementioned search and savestate functions.