Hi Guys here a extension for Google Chrome

http://fbgameid.com
[img]https://2img.net/u/1216/20/04/86/smiles/1343629963.png[/img]

Add the extension and go to dragon city over the game and see your facebook id and session id  CLICK TO ADD FIND GAMEID PRO HERE BUTTON!
This is not my but i tested it work
[img]https://2img.net/h/oi61.tinypic.com/2akha2f.jpg[/img]
(screenshort) 
[img]https://2img.net/u/1216/20/04/86/smiles/1343629963.png[/img]

Edited by Cuup