Examine source code of Star Match Game

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Star Match Game",
  "short_name": "star match",
  "version": "0.1.4",
  "description": "A classic matching game that plays in a popup.",
  "icons": {
    "16": "images/logo.png",
    "48": "images/logo.png",
    "128": "images/logo.png"
  },
  "action": {
    "default_icon": "images/logo.png",
    "default_popup": "index.html"
  },
  "permissions": [
    "storage"
  ],
  "offline_enabled": true,
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "{448081fa-1448-47b2-b18b-9a337227c46f}",
      "strict_min_version": "105.0"
    }
  }
}