Hide Your IP, Using Firefox
Download Tor software from this link
then install it.
Now download TOR plugin for ur FIREFOX
As soon as you apply that plugin , it will ask you to restart FIREFOX, do it..
Now u can see TOR DISABLED or TOR ENABLED text on right – bottom side of ur firefox browser.
Click on It if it is stating that TOR DISABLED , ur click will make it ENABLE.
Visit any IP showing sites. and check ur ip address.
Its all done