(CNN/Money) Ironically, a trusty online privacy feature can now be reworked into a "super cookie" that tracks you like a bloodhound.
Any respectable Web browser has a "privacy mode," a clean slate without the tiny bits of information (cookies) that identify you to websites. Google Chrome has "incognito." Mozilla's Firefox has "private window."
But there's a chink in privacy mode's armor.
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A software developer in London has discovered a string of code that can carry over from your regular session into private mode, rendering privacy mode somewhat useless.