Any time you choose to have Mozilla Firefox save your passwords to easily log into a page the next time you visit it they're stored on your computer. All of these passwords are also visible to anyone who goes into the security options of Firefox. To help secure your password information from anyone else using Firefox or from anyone that could steal your computer follow the below steps to setup a Master Password.

1. Open Firefox and click Tools and then Options.

2. In the Options click the Secur...