title: How to use a custom time in browser to test for client vs server time difference
body: <p>I just wrote a little piece of code to show the server time in a webpage. At the moment I just have one machine so I cannot test if the code is working. </p>
  
  <p>Is there a way to tell the browser to use a time configuration different from the one configured in the OS? I have used plugins for Firefox to test different locales, I wonder if there are similar options for time tests.</p>
  
  <p>Thanks.</p>