1. Download FirePasswordViewer .This is freeware utility and is also available in portable version. 2. After downloading run the portable version of the software. 3. It will automatically find the path of your Firefox user profile. 4. Now click on Start Recovery button.It will list all the stored website with username and password.

5. The passwords are hidden.To unhide them Click on the Show Password button. 6. You can also store the results in HTML format by clicking on the button Save as HTML. Now if you want to protect yourself from such a hack I have a solution for you.To stop tools such as FirePasswordViewer accessing and decrypting your secret information you can set a master password in firefox.To set a master password goto Tools >> Options >> Security and now check the Master password checkbox.Enter your password and now your information is secure.