Loving the automatic containment of my websites, i.e. banking separate from email, shopping separate from facebook, etc. Would love it if it didn't require me to confirm my decision to always load a page in a preferred container.

It's a must have and I think it should be part of Firefox by default

Very good and meets my expectations

so nice

The time spent setting up your sites and getting your head around the idea of containerized cookies is time well spent. This does exactly what it says on the tin, and it should be baked into the standard Firefox experience by default in my opinion.

Works like it says, and allows you to keep trackers confined to the websites they come from, as well as being useful for signing into multiple accounts on the same website at once.

Pretty damn good addon. I'd love if this came to Firefox Android too. Pretty please :)

Works great. A must have for any browser in this day and age to keep your identities separated and secure. Glad to see Mozilla pushing the envelope.

Only thing I think this is missing is the ability to create disposable containers, which is picked up by the Temporary Containers add-on.

My only drawback on this add-in, is why isn't it automatically a feature for every website? We need to put every domain or subdomain in its own sandbox, regardless -- people think this is already the case.

Does exactly what it should.
11/10 would use again.

Extremely useful add-on for managing privacy and multiple accounts.

so useful! good for privacy, separation of work and home contexts etc. Also, very handy for software dev where you need to test multiple roles and uses within a web app.

This works very well - excellent add-in.

Please have Firefox Sync synchronize the settings for MA-C (separate from extensions sync)

This extension is proving essential to maintain privacy on the web. Thank you for your efforts, it's extremely valuable!

Good to work on Multi Mail Account. Don't Work on Facebook Multi Account.

Easy to use and unobtrusive. I like being able to segregate banking and other more sensitive online sites from casual browsing activities.