Automatically Logout of Gamil, Facebook when browser is closed

Gmail and Facebook has a feature that does not log you off when you close the browser. This is handy as long as you are not sharing the system with anyone.
here is a tip to auto log you off when you close the browser. I'm using chrome as an example.

1. Click on the Menu (right top cornor ) and select settings.

2. Scroll to the bottom and click on Advance Settings

3. Click on Content Settings and change cookies to "Keep local data only until i quit my browser"

Note: This will clear all the cookies which mean it will not only log you off from gmail and facebook but all other web sites that store cookies will be removed. This is good for one reason that your privacy infomation is cleared.