title: ChromeDriver error "unknown error: cannot get automation extension"
body: <p>Since the 7th of February all my tests are failing with the same error; the log entry reads:</p>
  
  <pre><code>RESPONSE MaximizeWindow unknown error: cannot get automation extension
  from unknown error: page could not be found: chrome-extension://aapnijgdinlhnhlmodcfapnahmbfebeb/_generated_background_page.html
    (Session info: chrome=57.0.2987.21)
  </code></pre>
  
  <p>I'm not sure if this is caused by a Chrome update or something else - the message is vague enough as it is.</p>
  
  <p><strong>EDIT</strong>: I am using C#, and the latest Chromedriver.</p>