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Visibility.js is a wrapper for the Page Visibility API. It hides vendor prefixes and adds high level functions. Page Visibility API allows you to determine whether your web page is either visible to a user or hidden in background tab or prerendering. It allows you to use the page visibility state in JavaScript logic and improve browser performance by disabling unnecessary timers and AJAX requests,
October 11, 2010: Reported on the front page of the New York Times Find the latest details, code, and implementations on github @ https://github.com/samyk/evercookie DESCRIPTION evercookie is a javascript API available that produces extremely persistent cookies in a browser. Its goal is to identify a client even after they've removed standard cookies, Flash cookies (Local Shared Objects or LSOs),
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