Examine source code of Netvibes Notifier

{
  "name": "Netvibes Notifier",
  "version": "0.2.11resigned1",
  "manifest_version": 2,
  "description": "Displays the number of unread items in your Netvibes account.",
  "icons": {
    "16": "img/icon_16.png",
    "32": "img/icon_32.png",
    "64": "img/icon_64.png",
    "128": "img/icon_128.png"
  },
  "background": {
    "page": "background.html"
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "web_accessible_resources": [
    "js/application.js",
    "js/background.js",
    "js/options.js"
  ],
  "permissions": [
    "tabs",
    "*://*.netvibes.com/*"
  ],
  "browser_action": {
    "default_title": "",
    "default_icon": "img/disabled_64.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{768d6c6f-aa9c-4a00-ab73-52cacf663412}"
    }
  }
}