This extension should definitely be a built-in feature.

I love Multi-Account Containers. It helps me keep my online live organized. A must have addon.

Works great

Feature request - keyboard shortcut to open the containers extension and automatically highlight the "Search container name" box. Would be very handy for opening containers on the fly with less clicking needed

Great way to lose data and mess with your cookies. GUI is unbelievably awful.

Genuinely one of the top reasons I use Firefox.

It must be killer feature of Firefox!
But there are some issues:
* Ability to edit domains assigned to container (not via deleting them and re-adding new one)