I wanted a way to nest tabs so I could identify the parent/child relationship and this extension seemed promising, but it brought more usability issues than I could manage.

Tbh I think the issues are not caused by the extension but that FF is inconsistent.

If I open a new window with Ctrl-N then it may or may not show the side bar, who knows. If I open a new window by calling the EXE again (either from an AHK hotkey which loads the start menu shortcut or right click FF taskbar button > Open New Window) then it always opens a new window without the side bar displayed.

On top of that, I have FF set to restore previous windows at start. But if I close and reopen FF then none of the restored windows have the sidebar enabled, and even Ctrl-N stops opening new windows with the sidebar. I have to go through this convoluted process of going into Settings > Customise sidebar, then enabling 'Open tools from sidebar', making Sidebery visible, then disabling 'Open tools from sidebar' again. Only then will it whow the sidebar on new windows when I use Ctrl-N (but not the EXE or shortcut). And this only applies until I close and reopen FF then I have to go through that process again. It's too much work.

Maybe I'll try it again some day, but FF behaviour needs to be more consistent before I can use this extension, and for now I have gone back to plain old horizontal tabs.

Sigue mostrando todas las pestañas: inactivas y activas, solo suele ser útil para organizar pero no para reducir el ruido visual

The worst extension I have ever seen. You can't change the language, forcing me to use a UI in a language randomly picked by the extension itself (and to make things worse, this translation is just typical, low-quality AI slop). Why not just make the clean, original, human-written English language the default option? For some reason, the developer intentionally ignores this glaring issue and refuses to add a simple language toggle. I ended up having to delete the extension because it's completely unusable due to the UI language.

This extension totally changes the browser workflow. If you have 300 tabs open, it's a must have!
Best together with some userChrome.css tweaks.
No other browser and extension come close.

хорошее приложение и что поражает имеет 25 млн настроек. что я пока читал на четверти уже устал и уснул ахахаха. При это всё переведено на русский. Даже не представляю как еще можно сделать это расширение лучше

Really like this extension. I have just one request: please add the option to create a new tab + when hovering over a group (folder) we have created, while keeping it colour setting. I know it can be made by clicking on the group heading in the page that way, but my suggestion would be a nice bonus! thanks for this extension very much!

This fixes so many little nitpicks and inconveniences I have in my daily use of Firefox!

I usually have hundreds of Tabs open in sometimes more than 10 windows.

Now I can have one window with multiple panels, each categorised and it is so simple to move multiple tabs between them.

I love the vertical tabs that Firefox added natively, but they can not as easily be sorted and you cant even have the newest one appear on top.
Now I can!

Amazing add-on!
I hope it keeps on going for a very long time <3

I stopped using Zen browser. The extension works better now.

It turned the entire structure—which I had spent so long building—into mush.

Hello.

When I enable Sidebery, if I try to use two or more “X” accounts in separate containers within Firefox's container tabs—specifically on the social media platform ‘X’—I lose access to “X” the moment I enable Sidebery.

It is unclear whether this is specific to the social media platform “X” or if it happens whenever you try to use two different IDs under the same domain in container tabs, but at least with “X,” attempting to open it in a specified container results in a loop where it keeps opening in the @*** container (where *** is the X username), preventing it from opening in the container tab.

If you turn Sidebery OFF, it won’t get stuck in a loop opening in the @*** container, and you’ll be able to open it in the specified container.

Firefox 151..2
Sidebery 5.5.2