Examine source code of Classic Rides_Quiz

{
  "manifest_version": 2,
  "name": "Classic Rides Quiz",
  "version": "1.0",
  "description": "Classic cars & automotive icons quiz from Vietnamese clues.",
  "icons": {
    "48": "car_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Classic Rides Quiz"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b796464e-cb60-47ec-94d6-cb2ab2162bdc}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}