Examine source code of Weather Conditions

{
  "manifest_version": 2,
  "name": "Weather Conditions",
  "version": "1.0",
  "description": "Popup game to practice Vietnamese weather condition words in English – useful for daily conversation and travel.",
  "icons": {
    "48": "weather_conditions_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Weather Conditions"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{09eeadac-9724-4353-90b3-4723ada7dda6}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}