Examine source code of Game library

{
  "manifest_version": 2,
  "name": "Game library",
  "version": "1.0",
  "description": "A set of browser games made with canvas",
  "browser_action": {
    "default_popup": "popups/index.html",
    "default_icon": "images/border-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f325c032-7317-4730-8755-595517140afc}"
    }
  }
}