Examine source code of Viet Vocab

{
  "manifest_version": 2,
  "name": "VietVocab Quiz",
  "version": "1.0",
  "description": "Practice Vietnamese-to-English vocabulary with fun daily word quizzes right in your browser popup.",
  "icons": {
    "48": "vocab_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "VietVocab Quiz"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b443891c-ad63-4a46-847b-628a63ee0579}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}