Examine source code of Barista Master Quiz

{
  "manifest_version": 2,
  "name": "Barista Master Quiz",
  "version": "1.0",
  "description": "Global coffee quiz – from Vietnamese clues to English names.",
  "icons": {
    "48": "coffee_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Barista Master Quiz"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{01cf75de-4a80-451b-a0b7-8da6d312fe53}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}