Examine source code of Weather

{
  "manifest_version": 2,
  "name": "Weather",
  "version": "1.1resigned1",
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "browser_action": {
    "default_title": "Weather",
    "default_popup": "popup.html",
    "default_icon": "icon.svg"
  },
  "permissions": [
    "*://*.openweathermap.org/*",
    "webRequest"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4013236-89d1-4f0d-93e6-902762370984}"
    }
  }
}