Software

To force FF remember all site passwords:

1. Close any instance of Firefox.
   
2. Open up C:\Program Files\Mozilla Firefox\components\nsLoginManager.js using notepad. (Change the location to where you have installed Firefox)
   
3. Search for the line: _isAutocompleteDisabled : function (element) {
4. Delete the three lines after this line.

Source: http://www.dailygyan.com/2008/08/force-firefox-to-remember-password-of.html