Great one, I like how I can customize name & color of containers, I like to use custom icon too, great job Mozilla, keep it up!

Easy to use, awesome to be able to separate individual accounts with only one browser open.

Very useful, it allows loggin on differents accounts to the same service (ex: two gmail accounts). It helps limiting the tracking and is easy to understand with the default categories.

This seems like a nice tool. I can't really tell if it's working as described and keeping cookies and tracking contained within different work flows. It's hard to know exactly. But the tool works well, and it seems that account logins are isolated withing a container.

A great tool for dealing with multiple web accounts. They finally added sync, which means this is now feature complete! Awesome! Please don't ever drop support for this!

Its very useful. Thank you so much.

This has great potential! Sadly it outright refuses to work in private browsing mode. I wish it also had a few more customization options too. Works perfectly on normal windows!

Great extension, the ability to open a site in its own container makes it almost perfect. One thing that still lacks is the ability to sync settings between firefoxes installed with same account.

This addon is really useful. It helped me manage my personal, college and work accounts without constantly signing out of one and signing in to another. If you have more than one account for the same thing I recommend this add-on.

Works!

Does what it says and I LOVE it, I have multiple accounts to manage and with this addon I can keep everything organized and don't have to stress with multiple browsers

Very limited. Very easy to use different container by mistake. CTRL-click inside one container opens tab in different one. New tab (Firefox "empty" page) is unaffected by container - shows pages opened in all containers.

Very useful tool to use multiple accounts in one service.
Better than private tabs for using services and prevent cookies tracking.