Examine source code of VietVocab Master

{
  "manifest_version": 2,
  "name": "VietVocab Master",
  "version": "1.0",
  "description": "Master Vietnamese vocabulary with fun daily quizzes! Practice translating common Vietnamese words and phrases into English. Improve your language skills through interactive challenges and instant feedback.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "VietVocab Master"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b8ccdc85-225d-4230-b493-edb3d62a8793}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}