Track Passwords for Specific non-Google domains

Password Sage has an internal configuration engine that allows adding specific new domains fairly easily, so any large sites such as Twitter or Facebook are relatively straightforward to add.

The main work here would be testing to make sure everything still works with multiple domains, and updating the UI to specify which password was phished.

Making this work with arbitrary sites would be a next step after this.

However, I would like to know which sites are important for people, so please add this to the comments.