Examine source code of Idiom Match Master Pro

{
  "manifest_version": 2,
  "name": "Idiom Match Master Pro",
  "version": "1.0",
  "description": "Test and expand your mastery of English idioms through interactive matching challenges. Learn figurative meanings in context with instant feedback.",
  "icons": {
    "48": "idiom-match-master-icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Idiom Match Master Pro"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{372a6c61-4eba-4588-b83e-7de41ae6833d}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}