My job as a freelance translator means I work for different clients who sometimes use the same services, i.e., I have more than one account with those services. Without Multi-Account Containers, my job would be a nightmare. Best add-on ever.

Great extension, just needs syncing so we don't have to repeat setup on every device.

Pros: 5 stars because it does what it says it does and well.
Cons: No saving settings across devices.

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.

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*