SocialHistory.js
SocialHistory.js is a nifty little bit of Javascript and CSS trickery that lets you have a tiny peek into what other sites your users are (or aren’t) visiting. Don’t worry you privacy nuts… the browsing history you can gather through this method is VERY limited and the identity of the user is always going to be anonymous. It just gives you a bit of insight into where your visitors have been lately.
Think of some of the possibilities – Ford could check to see if you’ve recently visited the GM site and if you had they might put put …

Yes, I’m talking about