absolutely essential addon to make Firefox multi containers usable.

This guy's done a great job of resurrecting this extension, and there's finally something out here with proper regex support.

The latest update (3.12.0) supports globs in a slightly more reasonable fashion than previously, which is great news.

At the moment, the globbing-behaviour around subdomains is still a bit wonky - Max, if you read this, I dropped a comment on the most recent commit with details (perhaps you should enable Discussions or Issues on this repo?)