Examine source code of Chesscheat

{
  "manifest_version": 3,
  "name": "Chesscheat",
  "version": "1.3",
  "icons": {
    "16": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "chesscheatextension@gmail.com"
    }
  },
  "description": "Always see the optimal move in any chess.com game. Guarantees wins almost 100% of the time",
  "content_scripts": [
    {
      "js": [
        "scripts/main.js"
      ],
      "matches": [
        "https://www.chess.com/*",
        "https://chess.com/*"
      ]
    }
  ]
}