title: How to detect users setting do-not-track
body: <p>I was looking through some Google articles and some Firefox developer areas and found that there was an <a href="https://support.mozilla.org/en-US/kb/how-do-i-turn-do-not-track-feature" rel="noreferrer">option you can set</a> to not let some sites track your information.</p>
  
  <p>I looked into this and did some google searches for Developers and couldn't manage to find any information on how to detect whether or not a user has set this in their browser.</p>
  
  <p>Is it sent in a <code>POST</code> request or in any type of request? Does it come in the User agent? I just wanted to know how to manage this and not store their <code>ips</code> for login as an example.</p>