http://howtophil.com How To Use Private Mode Browsing In Firefox To Protect Your Data - HowToPhil Everyone occasionally finds themselves using a friends computer or a public computer. No matter how much you trust your friends you may find that you are concerned with the possibility of leaving behind automatically saved passwords, cookies, and other cached data. Firefox has a built in solution to this problem. This solution is called "Private Mode Browsing" and can be activated with a simple keybaord shortcut.