Examine source code of Vocab Odyssey

{
  "manifest_version": 2,
  "name": "Vocab Odyssey",
  "version": "1.0",
  "description": "Vocab Odyssey is an engaging vocabulary trainer that helps you master essential Vietnamese-English words through interactive quizzes.",
  "icons": {
    "48": "vocab_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Vocab Odyssey"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{908924c6-4a84-440a-911b-c1f7eb649707}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}