Offer to assign domains seen during redirect chain

[joolsoneill-hash]

I have a website that I need to log into that I need to open in a container to avoid SSO issues (I use a separate username / password).

I ran into an issue where firefox was trying to open URLs that the site (opened inside of the container) redirected to outside of that container, causing issues. To resolve that, I inspected the site for redirects, and added them to the "always open in xxx container".

It would be great if the extension could record the redirect URLs and ask the user if those additional redirects should be added to always open in that container.