Examine source code of Metropolis Mind Quest

{
  "manifest_version": 2,
  "name": "Metropolis Mind Quest",
  "version": "1.0",
  "description": "Challenge your global knowledge with rapid-fire true or false trivia about famous cities, landmarks, and world cultures. Simple, fast, and educational!",
  "icons": {
    "48": "metropolis_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Metropolis Mind Quest"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d6114214-2089-4e6c-a572-70550ec3399b}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}