This is just so good.

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!