User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0 Build ID: 20170419042421 Steps to reproduce: Used a USB drive and downloaded a simple tool and created an autoexec.bat file. Actual results: I got all of the saved passwords from Firefox and several other programs I have on my computer just by plugging the drive in. Expected results: Nothing (probably)
Unless you use the "Master Password" feature Firefox relies on the operating system to protect user data. Use a password on your account and lock it when you step away from the keyboard. If you share the computer set up at least a guest account (for transient borrowing) or multiple user accounts with non-administrator permissions.