GMGruman wrote in to say "Microsoft embarrassed itself last week when it got caught using 'zombie cookies' — a form of tracking cookies that users can't delete, as they come back to life after you've 'killed' them. Microsoft says it'll stop the 'aberrant' practice. But Woody Leonhard says you ain't seen nothing yet. It turns out HTML5 offers a technical mechanism to give zombie cookies a new lease on life — and the Web browsers' private-browsing features can't stop them."
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