Even wonder if the sites you log into on a regular basis might inadvertently let any of that information leak? If you want to see a very real, interactive example of just how prevalent this might be, just check-out JavaScript guru Kent Brewster’s series on “How to Tell if a User is Logged In to X”, where “X” is one of the leading online services millions of us use every day. Last week the “X” was Facebook and today “X” is Netflix. Because the examples are live and work with you and your own…
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