Multi-Account Containers have been one of the best new web-browser features that have been developed in a long time. This is a fantastic way of keeping work projects and personal/work logins separate without having to switch browsers. This allows me to use multiple log-ins to Gmail or AWS while still just switching between Ffox windows or tabs.

Now they just need to make it easier to open/manage tabs in a specific container, and allow the Container settings to sync with a Ffox Account across multiple computers.