Not sure at what point this started happening, but I just noticed that every tab I have open is automatically bookmarked in a folder tree (under Simple Tab Groups, with sub folders for each group I have), and closing a tab doesn't delete the bookmark. I unchecked the option "Allow access to bookmarks" and deleted the created bookmarks.

With that being said, I love the add-on and appreciate the QoL improvements it brings to my internet. Can't imagine not having it at this point.

Lost all my tabs from 4 out of 5 groups I had created. I will be looking for another extension

The Sidebery is the best!

Good

I use Firefox because this add-on exists. It is such a valuable add-on.
Report a small bug. If you duplicate a tab by middle-clicking the reload button in Firefox, a new tab group will be created automatically the next time Firefox starts.

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Couldn't figure it out. It needs some instructions.

I think there is a flaw in the extension that's why I rate it with one star.

I use a computer with 16Gb ram. Without the extension it is rare that just browsing I reach 20% ram and a few minutes of use I have reached up to 97% ram usage using this extension. outrageous!

I tried to perform a backup on one computer and then restore to another. Tabs were moved all around. Eg. All of my amazon tabs were placed in the Amazon group. Even the Amazon tabs that were in my Main group were moved.

Incredibly useful if you have too many tabs and windows open. I have now reduced it down to one window, and my work item tabs bundled together into their own project groups.

Possibly the best extension out there!

Stumbled on a small problem while using this addon with userChrome.css: having multiple groups makes your tab list interspliced with hidden tabs, which makes it impossible to reliably use Next-Sibling Combinators. I understand that this is a very niche problem, but damn it’s annoying.

Feels more like "Simple Tab Workspaces" to be honest, but turns out that's just what I needed. It's a powerful and polished extension; there are fully-fledged browsers trying to implement workspaces and still lagging behind STG. That said, it might not have the most intuitive learning curve for some.

Not simple at all and is buggy as hell. I keep losing tabs, the add-on keeps deleting or hiding all tabs when opening groups, or just closes Firefox totally resulting in the loss of all opened tabs. Many desired features are missing. How can this be the top-rated Group add-on is beyond me.

Если в процессе загрузки страницы произошла ошибка, например, 'Попытка соединения не удалась', то переключение между группами горячими клавишами становится недоступной.

This extension is the reason I cannot leave firefox and move to chromium based browser

I have used this extension for years and it was too good, but currently it loses all saved tabs on every Firefox restart and won't let me get them since the last backup, it became unusable.
(Arch Linux, Firefox 132.0)