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.

I downgraded to version 6.2.5. New update 7.0.0. it's unusable.

Update: Great! Version 7.0.1. it works. Again 5 stars. Thx.

I know it's first world problems, but three clicks to open a tab? come on, it was perfect before.

UPD: thank you.

Please revert the UI to allow one click for new container tabs. We primarily use containers to log into the same site multiple times on different accounts. No need to look at rarely-used menu options every time we want to open a new tab. Those menu options can't automate the primary use case.
Edit: Thanks for fixing this!

This extension is an absolute necessity for keeping your sessions from getting mixed up. However, the most recent UX update is so laughably bad that I need to find another option. Multiple clicks are now required to perform the most used function of the extension.

Update: thanks for listening to users feedback and fixing the issue.

It seems like the issue with Site Isolation is fixed now. Back to being a great add-on again. (I'm not bothered about clicks like the others since I right-click the New Tab button anyway)

Please please please change the UI back to allowing for opening a new tab in one click.

Edit: Anyone else coming across this - right click (if you can) the regular new tab button in your tabs list and you can do it quickly from there. May be worth making this more obvious to the end user!