Snake Game Offline on Google Chrome

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Snake Game Offline on Google Chrome",
  "version": "1.1.0",
  "action": {
    "default_icon": {
      "24": "img/24x24.png",
      "32": "img/32x32.png"
    },
    "default_title": "Snake, click to play!",
    "default_popup": "index.html"
  },
  "background": {
    "service_worker": "update.js"
  },
  "offline_enabled": true,
  "description": "Play classic Snake game offline version on your Google Chrome!",
  "icons": {
    "16": "img/16x16.png",
    "48": "img/48x48.png",
    "128": "img/128x128.png"
  },
  "options_page": "index.html",
  "homepage_url": "https://www.w3technic.com/free-chrome-game/snake-game-offline-for-google-chrome/"
}