See saved passwords in firefox
1. Open Firefox Web Browser
2. Then Click on FireFox > Option > Option
3. Then a POP Up box will appear, In that go to security and click on Show Passwords
4. Now click on website whose password you want to see ans click on show password . (Note: It will ask for confirmation so click on yes when dialog box appears)
5. Done, You have hacked password of your victim with few simple steps. You can try this at school computer lab if someone have saved their password.