Containers are more convenient than having multiple profiles in different windows. Must have for testing when you need multiple sessions to test web software. It is easy to open the same site in different container right from tab. Also there is useful feature to configure some sites to be always opened in specific container by default. This way i separate personal sites and sites for work.

I find this extension extremely useful for managing different user profiles (personal and work related) in the same browser!
Previously I had to use two different browser to keep the logins separated yet accessible. Now I can manage everything within Firefox!

Very good add-on for privacy conscious people. It's fantastic I can separate work from private things this way. Signing it to the two different accounts in the same time is also great by the way. I've got no problems with this add-on so far.

Very useful. I use it to keep my work and personal profiles separated

Perfect! No need to open different browsers to keep things separated anymore!

Goodapp

Great extension! Killer feature indeed.
What is to be implemented at first; add containers to bookmarks. Then we could start any web service under desired account, and don't forget, which container(s) we usually prefer for this service.

Compartmentalization. Good Stuff

Allows me to separate work accounts from personal accounts or primary account from test account even on websited that do not support this natively. Super useful and works without issues for me.

One Word - GREAT

It's great because it helps you know what tabs are you opening and don't forgot your self spending a lot of time on something useless

This is a must have extension for anyone who juggles both work and personal on a single computer. I install this extension first whenever I have a new install of Firefox

One of the best futures that helps to avoid the need for multiple browsers.

does the job correctly. work and home tabs are kept separately. its still a work in progress (cannot open a bookmark directly in a container) but it does a great job in keep cookies apart.

Module très utile :
- simple d'utilisation
- multi-sessions pour les sites qui ne le supportent pas nativement
- limitation de l'efficacité du tracking
- développement web facilité

but there is a problem with "always open in ..." please give us an update.
when I have put the web page in some container and then add another web page in another container, the first page has become in the last container I choose.
note: the web page I mean is from the same website for example:
1) www.facebook.com/oyrwe
2) www.facebook.com/cvxvx
it also needs some grouping mechanizm

Really useful if use with "new container tab" and "switch container"