site not to sell the user's personal data to other parties. This test checks to see if the GPC header is sent to third-party elements on the web page.</span></div></td><td><div class='dataPoint tooltipParent bad'
> &nbsp;
<span class="tooltipText">passed: false</span>
</div></td></tr><tr><td><div class="tooltipParent">IP address leak<span class="tooltipText">IP addresses can be used to uniquely identify a large percentage of users. A proxy, VPN, or Tor can mask a user's IP address.</span></div></td><td><div