Very useful addon, adding custom rules in text form is a million times better than whatever "Multi-Account Containers" is doing.

However, the "Basic mapping" rules added by this addon do not work, at all. Example: if you go to https://www.nexusmods.com/ site, then click + in addon settings, it will add an "www.nexusmods.com" rule. It doesn't do anything. If you then go to "www.nexusmods.com", it opens not in a container.