I searched for it and was happy using it - until it repeadetly erased all saved tabs after some weeks of using it without problems. 2 times. Which makes my work life really crappy.

Lost tabs of days of work
Backup doesn't work as all groups I saved are empty !
What's the f*** with your extension why it hide the tabs !
So after firefox restart all are lost without any reason !

Thanks to this half assed extension I just lost over 100 tabs I had opened in my browser. Thank you.

I just installed it yesterday and so far it f*ck*d everything up it could.

1. I moved some tabs into a new window to convert it into a tab-group but I didn't find any option that offered specifically that. So I choose "Create new group" in the hopes it would do that OR open a new window where I could move said tabs afterwards. It emptied out the current window without asking for confirmation or even a warning instead. :-(

2. Needed to restart my PC so I "closed all [Firefox] windows on this screen" (or however this option is called in English Windows). I expected Firefox to restore both windows after I started it again. Instead it just opened the new little group from 1. and an empty group. My (ungrouped?) window with ~200 tabs was nowhere to be found. :-(

Luckily it seems I was able to restore most tabs that had vanished in both cases.

新版本工具列圖示點擊竟然改成展開群組。
關閉分頁後其他分頁亂跳，切換群組不順暢，毫無長進。

trying to export all my groups from sync tab groups hangs up firefox
it seems like it tries to open all tab in all groups which is just crazy and brings down firefox to crawl which is duh it's like over 2 thousand tabs sync tab groups must work in other way because I never had problem importing that many groups and tabs

and my system is not weak Ryzen 7 3700X and 16GB of RAM with Firefox running on ssd

Didn't work.

I had quite some tab groups, but they were suddenly empty, so better keep your bookmarks organized.

Unfortunately, some of the groups you create randomly lose all tabs. In the next session, only the empty groups will be there. Thus, the extension is unfortunately almost meaningless, too bad. Apart from this, the idea of the extension is great - if it would work though...

This add-on is now completely broken. Tabs opened in or moved to a specific group will show up in all groups, obviating any benefit this add-on might create. Unless this is fixed, the add-on cannot be used anymore. It's probably time for Mozilla to develop a proper tab group replacement for modern FF.

This is a sad joke:
- it doesn't work if 'Restore previous session' is disabled,
- it doesn't work in private mode.

As it is it's a waste of bits.

Been using this for a while and it's pretty nice. Recent update said to set the add-on to not work in incognito mode. Fair enough. I changed the setting. All my open tabs were lost immediately. My browser was reverted to the state it was in ~1 month ago. I can't even recover them with recently closed tab or recently closed window. For an extension that's supposed to enable my tab-hoarding, this is a low blow.

i finally understand the problem. please fix this.

1. "default Tab Groups" is always open
2. i open "work Tab Groups" that have 10 tabs in new window
3. i reload and check 3 of "work Tab Groups" and don't check the others
4. and i close the "work Tab Groups" window
5. when i open "work Tab Groups" window again, only the 3 tab that i checked last time, have links. the other 7 tabs, are null and when i click on them, it opens a blank page!

Did just delete all of my open tabs without any warning after working fine for a year

This addon has always worked fantastically, and I was really happy with it until the last update (ver. 4.0.0.2) that f*cked everything up.
I DON'T want to restore the previous session automatically every time I start Firefox!!! and I don't want to see the same screen warning me to do so every time I open the browser.
PLEASE REVERT TO THE PREVIOUS VERSION. thank you

When TG was updated automatically to V4.0.0.2 I got the message -
"No support incognito mode, please disable incognito mode for add-on"

I checked the TG add-on option "Don't Allow" for "Run in Private Windows" and restarted FF.

I then got the following page -
"Welcome to Simple Tab Groups v4
Please enable "Restore previous session" in browser settings:"

I checked the box "Restore previous session".

I also noticed that all my tabs disappeared from every tab group. I restored them using a backup and restarted FF.

I again got the following page -

"Welcome to Simple Tab Groups v4
Please enable "Restore previous session" in browser settings:"

even though the "Restore previous session" was already checked.

Every time FF v68.0 starts up, the

"Welcome to Simple Tab Groups v4
Please enable "Restore previous session" in browser settings:"

page is displayed even though the "Restore previous session" box is checked.

I reverted back to v.3.4.4. I have also turned off "automatic update". This is not a good rollout.

Overly complicated! When I open a tab group, and then close one of the tabs, that tab is PERMANENTLY removed from the group! WTF? If I wanted to remove it from the group I would have said so! I JUST wanted to close it!

The groups change automatically as you open and close tabs. That's not very useful.

Very good plugin, but today it appeared "unknownError unrelated to the database" error, and all hidden tabs pop up to my browser, and the plugin keeping no work.