Hide referrers with Keitaro TDS. Just place file hide_referrer.php with code below to application/redirects/

hide_referrer.php

<?php
/**
 * @redirectName HIDE REFERER
 * @redirectWeight 100
 */
class hide_referrer_redirect extends AbstractRedirect2
{
	public function go(Stream $stream, Visitor $visitor)
	{
		$this->setContent($this->_gethideRedirect($stream, $visitor));
	}

	private function _gethideRedirect(Stream $stream, Visitor $visitor)
	{
        $code = '<script>
	function go() {
		window.frames[0].document.body.innerHTML = \'<form target="_parent" method="post" action="' . $stream->getUrlWithParams($visitor) . '"></form>\';
		window.frames[0].document.forms[0].submit()
	}
</script>
<iframe onload="window.setTimeout(\'go()\', 99)" src="about:blank" style="visibility:hidden"></iframe>';

        return $code ;
	}
	 public function goDebug(Stream $stream, Visitor $visitor)
    {	
         return "Redirecting to: " . $stream->getUrlWithParams($visitor);	
    }	
}