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Ironically, the do not track setting itself can be used in browser fingerprinting.

• 55555 7y ago
  In fact, it is _primarily_ used as a point of entropy for tracking, and does almost nothing to prevent tracking, so all-in-all it's a huge net negative. And because it's mostly turned off, turning it on to be tracked less actually causes you to be tracked more.
  • titzer 7y ago
    Exactly, this is why it needs the force of law behind it.