Firefox has a built in password manager that helps you store usernames and passwords for the sites you need to login and use.
Once the username/passwords are saved by the password manager, you can visit these sites and login without having to remember the login details. Let's learn how to recover and restore Firefox password.
Restore dumped Firefox password
1. In the toolbar, click Tools< Options.
2. In the dialog, click Security icon < Saved Passwords to search the passwords you dump.
3. Input the site you want to find your password and click Show Password, you can find the password you want.
By this way, you can get back the passwords you dump. Easy, right? Try it now!
Firefox 3 touts faster rendering, vastly reduced use of system resources, clever new data-mining tools for your bookmarks and browser history, and more security features than any other browser."