First – go to facebook developers and after you login click on my apps tab at the top
then click on add a new app :
Second – and click on the Website option.
you will then be presented with a form where you have to insert your display name, name space and website category, just use your website name for the display name and namespace.
on the next screen you will add your website’s URL
We get the facebook login option installed on your website in a breeze.