The Password Exporter Add-on allows you to export and import your saved passwords and rejected sites. You can use this tool to copy the password between your computers – for example home and office desktops. Also very useful when you get a new computer and don’t want to loose all your saved passwords.
You can export the passwords either in XML or CSV file formats. The files could be encrypted during the export process. The encryption feature helps prevent casual users from seeing your passwords. Keep your exported password file very safe. Anybody can see it and export it otherwise. Delete the file once you have done with importing. If you have more than one password entry with the exact same host, username, and password, it is considered a duplicate by Password Manager and may not be imported correctly.
Password Exporter supports Mozilla Firefox 1.5 – 3.0a1, Mozilla Thunderbird 1.5 – 3.0a1, Flock and Songbird. Firefox 3.0b1 is not supported yet.
Once installed the add-on, restart Firefox and you can access and run Password Exporter at the following location:
Firefox 1.5 and Thunderbird : Tools -> Options -> Privacy pane -> Passwords tab -> View Saved Passwords button -> Import/Export Passwords tab
Firefox 2.0 or higher, Songbird and Flock: Tools -> Options -> Privacy (or Security) pane -> Import/Export Password button
You may also check out the Magic Password Generator, which makes custom passwords for each website, based off of a single master password.