Examine source code of Tic Tac Toe Pro

{
  "manifest_version": 3,
  "name": "Tic Tac Toe Pro",
  "version": "1.0.0",
  "description": "A polished, offline Tic Tac Toe game with AI opponent. Play locally or challenge the computer � right in your browser!",
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage"
  ],
  "update_url": "https://edge.microsoft.com/extensionwebstorebase/v1/crx"
}