Reset your Master Password for firefox

            

            Reset your Master Password if you've forgotten it ;

1. In the Firefox location bar, enter the following location:
   chrome://pippki/content/resetpassword.xul
2. Press Enter. 
3. The "Reset Master Password" page will appear. Click the Reset button, to reset your master password.

   

Remember: Resetting your master password will remove all of your saved usernames and passwords.