There are a lot of great things about this extension, but there are a few things wrong with this extension:

1 - Reordering the containers via Manage Container does not reorder the context menu when clicking on a link which you want to open a specific container.
2 - The Ctrl + Shift + # shortcut also does not use the same order, which makes the shortcut after reordering containers totally useless.
3 - Urls with paths cannot be assigned to default containers, making them very hard to use with sites that have the same root, but different authentication per path (which you thus want to open in separate containers).

These issues already exist a long time (and looking at the VPN stuff that is being added instead of fixing these) this extension will probably never work any better..

Which is a shame, because its a killer feature.