Download all .jpg attachments in an expanded gmail thread

gistfile1.txt

var els = document.querySelectorAll('span[download_url]')
for(var i=0; i < els.length; i++){
  (function(){
    var attr = els[i].getAttribute('download_url');
    if(attr.indexOf('jpg:https') != -1){
      var url = 'https' + attr.split('jpg:https')[1];
      setTimeout(function(){
        document.location.href = url;
      }, i * 1000)
    }
  })();
}