title: iMacro script to press keyboard button
body: <p>I want  a iMacro script  that can press  keyboard button on every 15 minutes  </p>
  
  <p>On every 15 min "Shift + S" should  be  pressed. </p>
  
  <p>Or  any  other  add on for  Firefox will also work that does  this  thing.   </p>