Examine source code of Vietnamese Intro Quiz

{
  "manifest_version": 2,
  "name": "Vietnamese Intro Quiz",
  "version": "1.0",
  "description": "Practice essential Vietnamese phrases for self-introduction, family, and travel. Fun quiz to help beginners learn and remember common expressions quickly.",
  "icons": {
    "48": "vocab_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Vietnamese Intro Quiz"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a65d3c9c-85bf-4709-9d91-c12e4568f286}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}