Examine source code of Vocabulary Vault

{
  "manifest_version": 2,
  "name": "Vocabulary Vault",
  "version": "1.0",
  "description": "An engaging browser extension that helps Vietnamese learners master English vocabulary through interactive quizzes. Build your word power with daily challenges and instant feedback.",
  "icons": {
    "48": "vocabulary_vault_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Vocabulary Vault"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{96c49beb-f93b-4c9e-bac7-95b604ef4592}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}