java code for editing web pages

1)open any website

2) paste the below code in  address bar 

 java code :

javascript:document.body.contentEditable='true'; document.designMode='on'; void 0

3)paste  code  in url  and  press enter 


4)place the cursor where u want to change and do whatever you want


advantage: 


for example u can change ur friends name and keep ur name on facebook 
or remove googles name and keep ur own name 
its just for funn but wont remain permanent this is just a java code to edit any web page!!