Examine source code of Play123

{
  "manifest_version": 3,
  "name": "Play123",
  "short_name": "Play123",
  "version": "1.0",
  "description": "Launch Play123 games instantly - search, click, and play directly in your browser!",
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon-192.png"
  },
  "icons": {
    "192": "icon-192.png",
    "512": "icon-512.png"
  },
  "permissions": [
    "tabs"
  ],
  "host_permissions": [
    "https://www.play123.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "play123@play123.com",
      "strict_min_version": "109.0"
    }
  }
}