Examine source code of Number Crunch Quest

{
  "manifest_version": 2,
  "name": "Number Crunch Quest",
  "version": "1.0",
  "description": "Challenge your mental math skills with fast-paced arithmetic questions and multiple choice answers. Perfect for quick brain training anytime.",
  "icons": {
    "48": "number_crunch_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Number Crunch Quest"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5c5c57c7-89ef-4f5f-957e-a341c6b331ee}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}