title: How to change Firefox icon?
body: <p>Is there any way to change Firefox system icon (the one on the left top of the window)? </p>
  
  <p>Precision : I want to change the icon of a bundled version of Firefox with apache/php and my application. So manual operation on each computer is not a solution.
  I try Resource Hacker and it's the good solution. The add ons one is good too.</p>