Useful tool to launch web-applications that allow one concurrent session only.

justo la herramienta que necesitaba para manejar todas mi cuestas en redes sociales

excellent

Great idea! Thanks a lot :)

Great - used different versions of FF via profile parameter before, this seems to be a much, lighter, better solution.

Suggestion: Can you move the color-marker to the top of the tabs? The "here is something new"-indicator icon collides with the group color markers.

the best browser

This addon is in my must have list forever!

Beautiful. Fantastic

Very Good!
It's useful and beautiful. Better if its text could support other languages.

Really nice, much better than I expected.

Helps me to manage multiple profiles in window. A great tool

nice addon

It is a very good and useful add-on. Reduces the requirement of using different browser to use multiple account login.

Really Great

Multi account using and most importantly mirror downloads. I am able to download multiple copies of the same file from a server when the server gives invalid responses.

This add-on is great for using multiple emails. Instead of needing to sign out and log onto another account, you'd just need to open a container and you're good.

I think it is a step in the right direction if you are conscious about privacy, it is a great foundation to build on.
I use it together with "Temporary Containers" to basically generate a new and independent private tab for every website I open.