Single greatest add-on in the modern browser era

Please add an option to stay de-contained!

Also the UI needs improvement... especially for fast switching of containers.

Excelente.

This is the way browsers should have worked for a long time! Thank you, Firefox for making a browser that works the way I do!! :-)

Great opportunity to be productive and enforce privacy

Ensures your privacy and is recommended by Mozilla

One of the most useful "features" of Firefox. I hope it becomes part of the standard browser one day!

Super simple to use with its clearly colorcoded tabs and UI actions, and good at what it promises: allowing multiple accounts on the same site in the same window (very useful when I need to switch between testing accounts for something I'm developing or trying out), and increasing privacy by containing your login and tracking cookies to the specific sites you use within the container without compromising convenience, as is the case with about:profiles.

Amazing plugin

Must have add-on for developers, power users, anyone who has multiple accounts on web sites / services, privacy conscious users and anyone who is aware of cookies and other more advanced tracking methods and want to keep activities separate (ex. Work, Personal, Development, Anonymous, etc.)