Hello,
I have a suggestion for the Multi-Account Containers addon that I think could be useful:
If a site is opened outside its assigned container (e.g. Personal), when you click on a link that leads to the same site (domain), the addon should just open it in the same container (or No Container) instead of asking to open it in the assigned container.
For example, if you assign github.com to Personal, and you open a github.com link outisde the Personal container, e.g. without a container, when you click on a link on that page it should just go ahead and open in the same container. This is different from when you insert a URL into the address bar or click a bookmark, where the behavior would stay the same as before.