If you use Firefox to store your passwords, and would like to analyze how often you reuse passwords, I encourage you to join the Test Pilot program [0].  The current study is looking at reuse of passwords.  It doesn't collect your passwords, just counts how many sites you use your top few passwords on.  The plugin lets you see all the data before sending it to Mozilla, so you can just look at the analysis without sending it if you want. (but it would be very helpful if you would send your data in.)<p>[0] <a href="https://mozillalabs.com/testpilot/" rel="nofollow">https://mozillalabs.com/testpilot/</a>