Examine source code of Vocab Trail

{
  "manifest_version": 2,
  "name": "Vocab Trail",
  "version": "1.0",
  "description": "A fun and educational quiz game to practice translating Vietnamese words into English, designed to boost vocabulary skills.",
  "icons": {
    "48": "vocab_trail_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Vocab Trail"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{69787a12-1cb4-4046-9e64-c526b86e7c21}"
    }
  }
}