function tabsInNewPage() {
  var links = document.getElementsByTagName("article");
  if (links.length === 0) return;
  links = links[0].querySelectorAll('a');
  var a = new RegExp('/' + window.location.host + '/');
  links.forEach(link => !a.test(link.href) && link.setAttribute("target", "_blank"));
}

tabsInNewPage();