I use this add-on mainly to reduce tracking by Google search. I.e. when I use Google search, I don't want to be auto-logged into my Google account or associated with my activity in Gmail etc. My laptop has 3GB of memory, it generally cannot handle more than one container running at a time. Instead of opening every google service in a container, I just have a container for Google Search and another one for Amazon (I'm not a big facebook user, but if I need to log in there I do so in a different browser.)

This arrangement surely makes my browsing less private than it could be as I'm logged into gmail etc w/o a container; I also have to ctrl-click links opened from google search and gmail, otherwise they open within the container.

I rated the extension 4 stars because I would appreciate an option to open outbound links (like google search results) outside of the container, without having to ctrl-click each time. I kind of wonder why containers aren't built into FF? But with the extension installed, the functionality feels baked in.

\o/

Found a bug: I have a container for Facebook (and only Facebook) that is set to "limit to designated sites". When I open a new tab and go to instagram.com, the browser gets stuck in an endless loop of opening the tab automatically in the Facebook container, closing it (because it's not facebook.com), opening it in a regular tab, and then closing it (because it thinks it should be opened in the Facebook container). Please fix.

Addendum: Please add support for manually rearranging the list of containers. Thanks!

I really like this addon and use it for two use cases: 1. multi-account usage and 2. privacy protection
I don't need to explain the first point - that should be clear.
I have tested the 2nd point thoroughly and can confirm the following: It works.
- to lazy to write examples - so test it on your machine ;-)

4 stars for thank you and also for supporting DARK THEMES, but it's not very simple to manage. I use it for years but I never understood it, like for example why the default named containers like work, shopping etc. I use it together with "Temporary Containers", also difficult to manage. (Note that this firefox page is ridiculously and revengefully "protected" from dark themes!)

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I have used this for add-on for quite a number of years, have never experienced any problems, and appreciate the role that it plays (with the Facebook-container package as well). Lastly, as an add-on it's been vetted by Firefox, which should be another layer of correctness and security for the code.