Great! A few suggestions Rated 5 out of 5 stars

I love this add-on! Great to convince others (or yourself) to be more strict about your password policy! The similarity graph is a great idea to do it :)

I'd love to be able to navigate better in my graph, though. I have 200-300 passwords, but I can only see a third of the graph, because I can neither zoom nor move the part of the graph that is currently visible. I'd love to see these features coming...

This review is for a previous version of the add-on (0.12).