Sometimes the most simple of tools turn out to be the most helpful. That's definitely the case with Password Finder.
Password Finder is a free Firefox add-on that adds search functionality to Firefox's Password Manager. The only drawback is that you can't search by password, but rather you search by Web site. Simply key in a Web site in the available search field, wait a second or two, and the site and password (if you selected it to be shown) pop-up in the window. Its as easy as that.
This is a great tool for Firefox users tired of weeding through all of their passwords. It's effective and easy enough for anyone to use.