Time and time again, people have suggested that you use multiple passwords for multiple websites. Using the same password over and over again might eventually lead you to trouble – should one of the many accounts you have across the Web ever be compromised. The Password Reuse Visualizer is, if nothing else, a great reminder of this.
This add-on will give you a visualization of your password use in conjunction with the websites you use any specific password on. Here is a little more about the extension from the developers:
The visualization is fairly intuitive, but here’s a quick summary of what this tool will tell you. The green nodes represent distinct passwords you use. Hover over them to see a visual hash of your password, and click to view your password in clear text. The visual hashes are produced the same way as in the visual hashing add-on. The blue nodes represent individual sites you use, and they’re connected, by blue edges, to the green password nodes you use on that site.
Want to give it a shot? You can pick up the Password Reuse Visualizer from the Firefox Add-ons website.