var i = document.createElement('iframe');
      i.src = 'https://www.baidu.com/favicon.ico';
      i.style.display = 'none';
      i.onload = function() {
          setTimeout(function(){
              i.remove();
          }, 9)
      }
      document.title = '你想改的title';
      document.body.appendChild(i);
 

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