Used to work, but now it keeps popping up a page asking if I want to Always Open in Assigned Container and there's no way to just reset it to default. I tried deleting the extension and reinstalling it, and now the option to create a new named container is gone! Very buggy.

Speaking of bugs, the context menu sometimes isn't there and the menu that is there (next to the URL field) locks you into the "Always Open in This Container" problem. I wish that icon wasn't there at all since this is a shared computer and the other people are likely to click on it to try to change which container they are in.