Implementation of Facebook SDK Connect from 2014.
https://developers.facebook.com/
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 72,770 websites that are Facebook SDK 2014 Customers. We know of 4,508 live websites using Facebook SDK 2014 and an additional 68,262 sites that used Facebook SDK 2014 historically and 1,549 websites in the United States.
Get a list of 72,770 websites using Facebook SDK 2014 which includes location information, hosting data, contact details, 4,508 currently live websites and an additional 1,031 domains that redirect to sites in this list. 68,262 sites that used this technology previouslyand 1,549 websites in the United States currently using Facebook SDK 2014.
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