FireFox Password recovers lost FireFox Master Password and saved login passwords. If the Master Password is unknown, you have to recover it first. To recover the Master Password, you have to use the universal password recovery methods, such as Brute Force Attack and Dictionary Attack. FireFox Password is very fast, the search speed is about 1,500,000 password per second on a modern quad-core CPU, however if the password is very long and complex, it may take a lot of time to find the password.