Examine source code of HTLiveSight

{
  "manifest_version": 2,
  "name": "HTLiveSight",
  "version": "0.9.7",
  "description": "A Hattrick Live Match Viewer",
  "icons": {
    "16": "skin/16stable.png",
    "48": "skin/48stable.png",
    "128": "skin/128stable.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "skin/16stable.png",
      "24": "skin/24stable.png",
      "32": "skin/32stable.png",
      "48": "skin/48stable.png"
    },
    "default_title": "Launch HTLiveSight"
  },
  "background": {
    "scripts": [
      "content/button/startButton.js"
    ],
    "persistent": false
  },
  "homepage_url": "http://htlivesight.sourceforge.net",
  "incognito": "spanning",
  "minimum_chrome_version": "13",
  "permissions": [
    "contextMenus",
    "notifications",
    "clipboardWrite",
    "*://chpp.hattrick.org/*"
  ],
  "options_ui": {
    "page": "content/settings.html",
    "chrome_style": false,
    "open_in_tab": true
  },
  "web_accessible_resources": [
    "content/img/foxball_32.png",
    "content/old_img/foxball_32.png",
    "content/themes/images/bg.png",
    "skin/128stable.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{469b7d40-de9a-11e0-9572-0800200c9a66}"
    }
  }
}