Generally, a great concept that changed the way I browse the web.
It could do with some usability and integration refinements but development is active as of summer 2018.

Just what i needed. Thanks to this add-on i could uninstall Firefox Stable and stay only with Firefox Developer Edition, with the same functionalities of multiple accounts, only 1 web browser and until now, at least, no problems to report. Maybe the system to have to use middle button click to open a tab with the profile of the tab that you actually are, is a little "annoying", but really, i would love that Firefox Stable has this add-on built-in, like Firefox Nightly has.

Awesome
!!!!!!!!!!!!!!!!!!

funciona a la perfeccion

Amazing addon. Please add a possibility to choose container using right click in bookmarks

I love it... incredible

This lets me compartmentalize my browsing. I can sandbox different domains so that data isn't shared between them. This feature should have been built into all browsers long ago. Given the currently weak state of online privacy, it's refreshing to use a browser and add-ons built by a company that cares. This add-on is simple to use, but I think it would be a little more intuitive if all actions were available through the drop-down accessed by clicking on the Multi-Account Containers icon. In any case, this will forever be a default add-on for me in all new Firefox installations.

Incredibly simple and powerful. I use containers to isolate google and facebook, and it was very easy to set up.

Simple and intuitive solution to sound data management. Yet again showing us how Mozilla is committed to data privacy and an internet based on the users as the customer, not the product. Thank you.

c'est cool

Outstanding extension - HIGHLY recommended. Isolate your browsing correctly and efficiently and enhance your capabilities of containerization. This is a must have app. They recently upgraded it to include preference sync!

So useful! You can use a keyboard shortcut to open new container tabs with [ctrl] + [dot]

pretty useful

Using this is way better than using different browsers to keep your sessions separate. A must have for anyone who has to juggle between different accounts for a given web site or web app.

Suggestion: When we bookmark something that's in a container, it would be nice to get asked if we want the bookmarked URL to always be opened in a the same container. This way we don't have to always think of manually putting it in one.

Easy to get started, provides different containers by default but can be adjusted to personal needs.
The different containers allow to log in to the same webpage with different user-accounts.