Examine source code of MyWeather

{
  "description": "Automated Weather Reporting",
  "manifest_version": 2,
  "name": "MyWeather",
  "version": "1.1resigned1",
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "icons/border-48.png",
    "default_popup": "popup.html?0"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{563f0007-53ae-45c6-8031-453a2a89d259}"
    }
  }
}