owser to instruct a website not to sell the user's personal data to third parties. This test checks to see if the GPC header is sent by default to the top-level website.</span></div></td><td><div class='dataPoint tooltipParent bad'
> &nbsp;
<span class="tooltipText">header value: undefined
passed: false</span>
</div></td></tr><tr><td><div class="tooltipParent">GPC enabled third-party<span class="tooltipText">The Global Privacy Control is an HTTP header that can be sent by a browser to instruct a visited web