title: chrome extensions - Content Scripts on demand
body: <p>I wrote my small extension for Chrome which works in the context of the webpage.</p>
  
  <p>Everything is fine, except that code is executed every time when I visit URL defined in the manifest.json in content-scripts matches. </p>
  
  <p>What I would like is to launch it manually - 'on demand' - after clicking on the icon of the extension next to the url bar. </p>
  
  <p>Is this possible?</p>