Implementation of Facebook SDK Connect from 2014.
https://developers.facebook.com/
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 66,183 websites that are Facebook SDK 2014 Customers. We know of 4,404 live websites using Facebook SDK 2014 and an additional 61,779 sites that used Facebook SDK 2014 historically and 1,516 websites in the United States.
Get a list of 66,183 websites using Facebook SDK 2014 which includes location information, hosting data, contact details, 4,404 currently live websites and an additional 995 domains that redirect to sites in this list. 61,779 sites that used this technology previouslyand 1,516 websites in the United States currently using Facebook SDK 2014.
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