This is the key reason I will never stop using Firefox. Such an underrated feature.

Works excellently. Perfectly solved a need I had. I started using Mozilla over Chrome for various tasks because of how valuable this is as a tool. My only complaint is that there doesn't seem to be a way to reorganize containers, without deleting them and recreating them in the order you want. This becomes troublesome when you have a lot and need to configure their ordering.

Multi-Acc Containers is a awesome tool for how I interact with Firefox. It's one of those technology tools that once you use it for the 1st time, you simply can't go back to your old ways ever again.

This add-on is absurdly useful for Enterprise IT administrators. It enables easy use of dedicated admin identities into separate containers for isolation form normal productivity work, and is particularly useful in contexts like Microsoft 365 / Azure where logging in to the same URLs multiple times in the same browser needs to happen with separate identities that have separate permissions granted.

Multi-Account Containers is a game changer for how I interact with a web browser. It's one of those pieces of technology that once you use it the first time, you simply can't go back to the older means of interaction absent the new features ever again. The degree of quality of life improvement I've received in using this add-on is gigantic, probably the most impactful change since discovering tabbed browsing in the late 1990s.

Thanks for bringing back the "one click to open new container tab" feature :)

Most excellent, essential for my job, thanks!

Please go back to one click to open a new container !!!

A must-have add-on if you use multiple accounts on different services (like work and private accounts).

Unfortunately, since the last update it is not possible to use the keyboard shortcut and select a container with the arrow keys, making the extension unusable.

Edit: This issue has been fixed and I can use the extension normally.

This is one of my favourite addons. I migrated to Firefox completely from Chrome and other browsers due to this and mainly Privacy security.

With the new UI updated and the keyboard shortcuts for container tabs, its even more awesome. The update had some confusions, because there werent proper onboarding for it. Once its setup and we know how to use, its better now.

I miss the following things still :-

1. Sort the container tabs in the container menu. This is a basic feature which is missing I guess.
2. A shortcut to open a new tab in the same container we are currently in.

I've been using this since shortly after it was released to separate logins to the same site by different users; for example, when testing a user account while logged in as an administrator. I also use it to log in to Office 365 with different user accounts while supporting multiple clients.
The recent UI change did seem inconvenient (more a matter of interrupting the flow) but seems to have been a necessary compromise to allow additional functions. Instead of left-click, left-click on the icon, it's right-click, left-click on the "Open a new tab..." button. Change is good, humans are capable of learning new ways of doing things without whining.
The new font in the list allows me to see all of my Containers.
One suggestion for a future enhancement would be the ability to sort or manually order my list of containers.

The last update made this plugin sadly a pain to use. Giving this 1 Star till it's fixed.
Update: As someone else mentioned here, there is still a 2 click option by right clicking the default Firefox "+" Tab.
But a reminder for this new feature would have been very useful.