Almost perfect extension for me. It let me separate accounts on sites or group sites...
After mess-up with certificates I lost all my custom made preferences and containers. Add back up ability even if I move to other computer and login to my Mozilla account I feel same good Firefox I'm used to.

Simple and useful application, but... It deleted all of my containers when I disabled it for short time.. so it should be? Then how to restore containers?

Perfectly addresses the need for being able to be logged in to the same site under two different accounts at the same time.

for now and next century, im officially never move from firefox as my default browser, i hope u guys still exist in next century *as well as i*

I've been looking for container extension. First time user, so I'll be poking around first

Very handy extension, the only wish is that it would adjust your bookmarks with each profile

Interrupts the user with a review request - literally unusable

this is the best extension on mozilla for people who have tons of account and want to manage all of them simultaneously with just a single browser. it would be perfect if this has sync features with firefox account.

A truly helpful feature would be an option to automatically move any site/url NOT assigned to a container into a user specified container (or at least the Default container). If this a already a feature, I don't see it. This would eliminate the need micromanage everything... set and done.