Examine source code of VietWords Challenge

{
  "manifest_version": 2,
  "name": "VietWords Challenge",
  "version": "1.0",
  "description": "A fun and educational browser add-on that helps users improve their Vietnamese-to-English vocabulary through interactive quizzes. Test your knowledge and enhance your language skills!",
  "icons": {
    "48": "vocab_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "VietWords Challenge"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{40bc8521-b8b5-4c22-a372-88bda142e3f6}"
    }
  }
}