title: Way to monitor website and taking screenshot on error
body: <p>is anyone know a way to monitor a website (check for specific content, response time, response status code), and take a screenshot of the "monitor ressource" website (for example on firefox).</p>
  
  <p>On failure, the screenshot is saved, sent by mail, etc...</p>
  
  <p>I know how to take screenshot of a website, I know how to monitor website, but I don't know how to do it at the same time.</p>
  
  <p>Is anyone already try to do the same thing ??</p>
  
  <p>Thanks for your help!</p>