How to hijacking http cookie

Hack Passwords by Hijacking HTTP Cookie

1. Download Firesheep Firefox add-on from any one of the links given below.
http://codebutler.github.com/firesheep/
Or
http://goo.gl/cUXYHp
Or
http://goo.gl/0WWjL1

2. Install this add-on to your Firefox (works perfectly on Windows XP and Windows Vista).
Restart Firefox, connect to any public wireless network.

3. Now, in the sidebar, hit on “Start Capturing” and Firesheep searches for and captures cookies in a wireless network.
4. As soon as anyone on the wireless network visits any insecure website known to Firesheep, their name and photo will be displayed in the sidebar.
Just double click on someone and you’re into his or her account.