Nice add-on, it should be a default feature in Firefox, however there are some points that I think it can make this add-on even better:

- the option to keep my containers parameters after disabling/enabling the add-on. Actually, if I disable this add-on, I will lose all my containers and it will return to the default configuration, so I have to repeat all the actions I did before (renaming containers, associating accounts, etc..). I don't know if we can consider this as bug.

- History panel remember with which container a site was opened and reopen it in that container Or make different history for every container and even better, make it possible to choose to open container with other profile (I don't know if this feature is even possible :-) ).

- An option for sorting history by containers.

- A password protection for containers.