This extension needs some work before it fits the concept. In situations where multiple accounts need to be managed on the same website (using multiple microsoft accounts for different clients, for instance) , it is generally not usable. The following workflow breaks it:

- Open tab in X container, login to a service
- Service uses redirects to authenticate, container extension grabs those redirects and loses the container status or changes the container status, breaking the login flow or putting a different login into the context

Additionally, there does not seem to be an option to remove a site from a container preference, once added.