I wonder if you could use this to find information about the google crawler. Inject system and browser info into the page. Then you can find out what kind of browser engine it runs, with which settings etc.. If you wanted, you could use this information to do undetectable masking (I don&#x27;t think it would work in the long run, though)<p>It would be also interesting to see what timeouts it still allows. I wouldn&#x27;t be surprized if the modified browser &quot;virtualizes&quot; time and runs window.setTimeout immediately. Maybe you could make a busy loop and find out what the real timeouts are. It seems there got to be some, otherwise this would open a way to DOS the crawler (not that I&#x27;d do that).