title: Firefox extension: Embed javascript in a webpage
body: <p>I want to insert some script into every page, which have some functions that will be called by the modified HTML of that page, using a Firefox extension. I am able to insert the JavaScript into the head of the HTML, and also modify the page, but the java script functions are not called by the onmouseover event.
  Does someone has any pointer on how to do that, using java script in local extension or as a online resource.</p>
  
  <p>No GreaseMonkey, I need to do it with my plugin and not ask user to install greasemonkey, my plugin and the scripts.</p>