Method addFavicon

/**
 * Adds a shortcut icon (favicon)
 *
 * This adds a link to the icon shown in the favorites list or on
 * the left of the url in the address bar. Some browsers display
 * it on the tab, as well.
 *
 * @param   string  $href      The link that is being related.
 * @param   string  $type      File type
 * @param   string  $relation  Relation of link
 *
 * @return  HtmlDocument instance of $this to allow chaining
 *
 * @since   1.7.0
 */
public function addFavicon($href, $type = 'image/vnd.microsoft.icon', $relation = 'shortcut icon')
{
    $href = str_replace('\\', '/', $href);
    $this->addHeadLink($href, $relation, 'rel', array('type' => $type));
    return $this;
}