Examine source code of VietTravel Words

{
  "manifest_version": 2,
  "name": "VietTravel Words",
  "version": "1.0",
  "description": "Quick Vietnamese travel vocabulary quiz in English. Learn useful words for trips, directions, hotels, and more!",
  "icons": {
    "48": "travel_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "VietTravel Words"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{00f4a790-ea45-447b-afa3-454f06906c76}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}