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A very useful extension.

I never knew I needed this until I used it. This is by far the most important (and practical) extension I have come across, especially if you have separate email accounts for work/home/etc.

Finally I can use multiple accounts instead of openning incognito mode or using other browsers.

Sadly, it still does not support right-click from bookmarks bar.

Easy way to sandbox different accounts. The ability to keep personal, work and other sites separate from each-other is awesome.

super pratique!

Now Office 365 using multiple accounts is not painful to manage on a daily basis.

Best thing to happen to Firefox since the Private Tabs addon doesn't work anymore! It's a bit complicated to make the addon learn the domain rules. But it works. Combine it with the addon Cookie AutoDelete! That basically gives you private tabs instead of having to open private windows.

Great extension!

It's so good, it's literally one of the biggest reasons why I use Firefox over Chrome.

Very useful

very good

Traz muita praticidade ao cotidiano!

This is nice. It's very intuitive and easy to set up again even when your entire configuration is lost.

So easy to use! Easy to keep common items together.

You've already been hammered with the privacy benefits and yada yada.
So I'd like to outline another major benefit: being able to authenticate to the same service with two different set of credentials. (i.e. logging into the hosting provider with both my personal account and the company's)

At the time of writing this is not working with Sync and there is a lengthy discussion on Github about the challenges of that.
Why it would certainly be nice to synchronize it's still useful as it is.

I work as a web developer on the OutSystems platform and use FireFox all day long for testing, inspecting and debugging HTML, CSS and Javascript code. In my opinion is the best web browser out there :)
Until I knew the multi-account containers extension, I had to constantly login and logout while testing web apps under several profiles. Now, with this extension, I can be logged in under several usernames (each with its own session) on the same browser window and it has made my work soooo much easier!
Thank you very much for your fantastic work on this extension!!!

Indispensable dans un environnement multi-utilisateurs ou dans un contexte de test isolé.
Essential in a multi-users environment or in a isolated testing context.

No hay nada más util, tiene la opción de filtrar sitios para que siempre se habran en un contenedor especifico y es lo mejor

With "Firefox Multi-Account Containers" , I can have multiple gmail accounts in different tabs at the same time. I found this to be very useful. Thanks to brilliant brains behind this!

Very useful, specially for the developers.

Works well. Allows me to open the same website with different identities which is really helpful at work. Thanks!

Super easy to use, only two clicks to open another account.