After installation CPU and RAM consumptiontion increased by ~20% and after five minutes did not come back, during work it slows down firefox significantly (firefox-esr 140.6), and finally it shomehow dropped my auth data on some sites. No thanks.

Excellent tab management. Way better than Chrome`s tab groups. Only thing that chrome has better is the look. This also has the the bar. But it is very light and not clear.

Finding it difficult to move a selection of tabs to a group, only works with one tab at a time it seems. Would also like to be able to do so without switching to that group.

Not a very good tab manager.

1) Can't move more than one tab at a time to a group.
2) Can't move a group in the panorama so that I can move a tab to it without scrolling to the new group. I saw a screenshot showing a Sort Containers screen but I don't see any way to get to it.
3) When moving a tab and scrolling, scrolling will sometimes stop and I'll have to start all over with the tab.
4) After moving tab, the panorama scrolls all the way down to the bottom and then bounces up and down for 3 seconds when I try to scroll up to the top again. Very irritating when trying to sort many dozens of tabs.
5) After sorting my tabs, ALL tabs still appear in the top tab bar instead of only the tabs in the group. No way to simply click on a tab in the tab group. Instead, I have to click the Tabs and Groups button, then click Groups (it's not sticky), then find my tab, usually by scrolling down and then scrolling right.
6) No user manual that I can find for more info on how to use this extension.

Maybe good for people that have less than a dozen tabs open but I deal with up to 100 at a time so I need something that doesn't involve a lot of clicks and scrolling to go from one tab in one group to a different tab in a different group.

I found a bug:
this extension thinks that about:addons page is container. I have disabled option to prompt to open new pages in container. So on all sites it opens pages in normal tabs and doesn't ask anything, if that site from where you opened new links - is not in any container. But there is a bug, that extension thinks that firefox internal pages are containers. So I would like not to be prompted to open page in container if I open "Reviews" link from my firefox extension description.

It would be ok, but it screwed up my gmail notifier and made dragging tabs around in the browser (normal stuff, nothing to do with containers) impossible. Bizarre.

Found this recently as an alternative to Conex which I discovered is no longer supported. Looks very promising. Is this still actively being supported?

Can you modify the Sort option to just provide a button to sort all containers without having to click up and down arrows to sort manually?

If possible, make sure that the tabs are grouped without containers.

It is not chrome-like. I hope it didn't need popup or sidebar to open and close groups.

This is perhaps the best add-on suited for my use case. I love arranging my tabs in a color coded way, and I like the container feature of firefox. This extension has enabled me to use the said feature effectively. It's not perfect, but the best for me.

That being said, I had some issues with the experimental features(of course). When I switched to enabling headers for all containers directly after never was selected, many duplicate header tabs were created for the same tab. However, It worked perfectly for only unused tabs. When I switched to having tab headers for all after that, I found only one duplicate of a no container tab. These are many of the expected problems apart from unexpected behavior sometimes.
Overall, I liked the add-on and would definitely recommend, but don't expect perfect stability.

This is the only add-on that I was able to get the multi login working at all the time, so truly fantastic

I've been searching and searching and searching. This is the only one that works like the Chrome one. Doesn't kill your tab when you try to move it back or between other groups like the other leading solution. Thanks for your efforts.

It's nice and easy to use.
Just an inconvenient is when I tried to send mutiple tabs from my Android phone to Firefox Desktop, only one (sometime twos) that I can open correctly, others are just blankscreen.

This is probably the closest to Chrome's tab grouping. However I'm not really a fan of how logins and cookies are separate between containers. Still worth using anyways.