This is a great extension. Manually changing the containers was a serious limitation for me. This perfectly isolates my work, banking and personal surfing.

It will be absolutely flawless even if you implement a very rudimentary wildcard support.

Something like (*.google.com) should work for:

maps.google.com
mail.google.com
plus.google.com

To limit the complexity, you need not support partial wildcards, like (m*.google.com) or wildcards in the suffix (example - google.* for google.in, google.com etc).

Good luck! :) Hope to see some sort of wildcard support in future updates.

Can you add wildcard support?

Instead of the current container assignment process which is quite basic today (hopefully it will improve), this addons makes the process so handy and mostly, easily maintainable. Thanks and long life to Firefox Quantum with Containers :)