Firefox lets you set a master password, which you are required to enter at the beginning of each session, in order to gain access to all stored login credentials. There is a need for a master key because Firefox lets anyone with access to your PC to easily view login id and password combinations in clear text.
What if you have one day suddenly lost the master password? You will lose all the stored credentials, and it’s close to impossible to recover your passwords, which have been encrypted by the master password.
FireMaster is a free password recovery tool that lets you recover Firefox master password using a combination of methods, including the dictionary method, hybrid method, and brute force method.
FireMaster.exe should be run from the command line with arguments based on the method you want to use to crack the password. Visit the developer’s site for complete details on how to use FireMaster to recover your master password.
Works on Windows XP, Vista, Windows 7 and is found to be compatible up to Firefox 5.0.1.