I've been using this addon for years. It's been great, but recently the feature to close tabs when switching groups to save RAM was removed from the settings. This feature was perhaps my favorite feature of this addon - if it were brought back, I'd give it five stars.

Used to love this. I have autobackup set up after a round a long time ago of it losing all my tabs. I don't save every single backup for space. My oldest is currently from last June. I've been saving tabs for projects, work, etc and when I tried to save one today it simply wouldn't respond. The majority of my tabs are gone and the groups empty. I'm not sure when it happened; even my oldest backup only has a couple of additional tabs to add. A lot of the newer things I added aren't there. I've lost tons of stuff. With backups, it never occurred to me I needed to check to make sure things were still there to even be backed up; my bad, I guess, for not going through every folder making sure every single thing is still where it's supposed to be at least weekly. Everything is simply erased.

Why does it need permission to "access your data for all websites"? A tab organizer shouldn't need access to my passwords I am typing to a website.

When it works it's awesome, one of the most useful extensions. But when it doesn't work, it just destroys everything. I had over 200 tabs across 15 or so groups. I opened firefox today and all the tabs are gone. The groups are there but they are empty... and this isn't the first time this has happened. So if you want to organize your tabs you can use it, but at some point it's just going to break and you will waste a lot of time opening tabs again.

Hotkeys only work half of the time making them unreliable and useless

Extremely confusing to use.

it groups tabs well and can be convinient but when i restarted my computer, all the tabs from my 4 groups were just gone. I even had them "backed up" since that was a defaulted option in their settings.

And then it keeps trying to hide tabs if you turn it off and back on. i feel like this is just another weird extenstion that just want to spy instead of making things more efficient. very annoying.

The extension doesn't support pinned tabs, which is what I was hoping to use it for. I have a lot of different groups of pages that I use for different projects, and pinned tabs are common in my workflow.

I was hoping I would be able to create different group of pinned tab (e.g. a group for work tabs, a group for personal tabs and a group for x other project), but I can't.

Another small nitpick is that all of the icons are near black, which makes them hard to read over dark mode theme.

Not so simple after all. I would love to see grouping like Chrome has it. I can see all my groups in one place (the tab bar). I can read name each group and open each group whenever I want. Super simple.

Has many bugs that are absolute deal breakers at the moment. It is very easy to loose all the saved tabs.

Looks cool, love the idea... but it backs itself up to a random location that I can't seem to change, likely won't use it until this is fixed.

It's not simple at all

4.8.1 version. Activation used 15MB RAM (only RAM, not total memory.) Full page tab group manager is only presented in bright white. -- even though I followed the instruction for setting svg.context-properties.content.enabled . User browser configuration has no effect. Group management tab shows as constantly loading.

Eigentlich eine gute Erweiterung um auf Themen bezogen die Tabs in Gruppen zusammenzuführen - jedoch: Mich jedes mal beim Gruppenwechsel erneut (z.B. in Youtube) anmelden zu müssen - das geht gar nicht. Ich werde jetzt die Themen auf verschiedene Browser verteilen müssen - zum Teil gibt es dort eigene Lösungen um Gruppen zu bilden. Das Add-On habe ich jetzt entfernt. Schade ...

Um add-on que se comporta de forma muito estranha. Parece bem bugado. Usabilidade deixou a desejar muito.

As some others have reported:
When I group some tabs, the tabs I have not grouped gets hidden. Why?
Why hide tabs on my screen.
I have to click some unload button to somehow maybe bring them back.

Overall feels buggy, or weird. Discard button does nothing. Bug?

I used it for two years, and I'm done with it. When it works, it's good. But as others have reported, without explanation, saved tabs will disappear without warning, showing a 0/0 for nearly all saved tabs.

At the moment I'm really disappointed that a plugin that is so hyped is not able to manage pinned tabs as well?
Why am I so disappointed?

I need access to a huge number of tabs, from different themes per window, sometimes 30 + x tabs per window, with 5 windows (themes).
Now I had hoped, through this add-on, to at least reduce the number of open Firefox windows, by switching tab groups, back to one window, since tabs in multiple rows no longer exist, thanks to Mozilla and the (crappy) web extensions, which are only useful from a security point of view. Only unfortunately, the web extensions have been forced on users in an overhasty and immature way (but that is NOT the fault of this add-on).
If this add-on also had access to pinned tabs, I could now conveniently switch between groups of tabs and would be willing to give 10 stars, so I give only two, because the idea is good, only its execution makes me shake my head.

If someone really needs many tabs of a topic area, between which one can switch then fast by click, then one is forced to pin these around without scroll orgies in the table bar to navigate.
And there you are offered, with the STG add-on, an actually ingenious solution to this problem and then this add-on does not have access to ALL tabs? An add-on whose only purpose is to handle tabs! Yes, it can not recognize the pinned tabs apparently, that is probably the worst joke you could think up.

Very buggy.
Tabs were duplicated a LOT, clicking on a tab duplicated it. Opening a new tab group created multiples of every tab.
Not fit for purpose.