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.

As an IT technician, I'm often switching between multiple tabs.
This add-on allows me to group tabs according to my customers, and simplify my day-to-day navigation.
A very useful feature of this addon is the ability to associate a group with a tab container: cookies are compartmentalized, so I can easily use several admin accounts on the same admin portal at the same time (several admin 365 accounts...).

this addon is ALMOST PERFECT. two things i'd love to see is the ability to SYNC TAB GROUPS across machines signed in to the same firefox account and the ability to SAVE PINNED TABS in a tab group. losing pinned tabs every time i forget and close a tab group is a real bummer.

Very powerful, easy to use, convenient. Great design!

Grouped tabs switching doesn't work when screen sharing is on during a google meet

Very useful for organizing my tab hoarding habit

Stumbled on a problem regarding this plugin’s internal mechanics: I can’t reliably use next-sibling combinators in my userChrome.css script because the tab list is interspliced with hidden tabs from other groups.
This could be fixed by making the plugin also sort/structure tab list group-by-group.
I understand that I’s a niche use case, but damn it’s annoying.

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.

My tab groups' tabs suddenly placed on one tab group! 664 tab groups into one. 400+ tabs missing!

[3 September 2024 Update]: Great Addon but since I installed it, it conflicts with the 'Tab Session manager', and causes errors to my Firefox. Please fix that problem].

WOW! Thanks to this video on YouTube (How to Use Tab Groups in Firefox) BY "The Linux Cast
"channel. That has demonstrated this extension, and I am glad I found that video. Because this Add-on is Truly helpful and convenient to me. Because I have 3500 tabs open in my browser and it makes my life much easier now that I have them in groups! Thank you for creating such an awesome extension!! 🌟🌟🌟🌟🌟👍

No icon on toolbar and it is not cleat how to find it :(

kompletny bałagan, wszystkie zakładki w jednej grupie, pozostałe utworzone grupy puste zerowa intuicja tworzenia, a tak było kiedyś dobrze.

The best tab management plugin I've ever found. Easy to move tabs into different groups, and best of all, you can have many, many different groups without slowing the browser down because they are only loaded when necessary.