Examine source code of Chess - Play & Learn

{
  "manifest_version": 3,
  "name": "Chess - Play & Learn",
  "version": "1.0.0",
  "description": "Open the extension on the top-right to open the popup and play against Stockfish at a chosen Elo.",
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "action": {
    "default_title": "Chess - Play & Learn",
    "default_popup": "popup.html",
    "default_icon": "assets/icon.png"
  },
  "icons": {
    "16": "assets/icon.png",
    "32": "assets/icon.png",
    "48": "assets/icon.png",
    "128": "assets/icon.png"
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "chess-play-learn@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self' 'wasm-unsafe-eval'; object-src 'self'; connect-src 'self' https://extensionpay.com;"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "overlay.css",
        "overlay.js",
        "lib/chess.js",
        "vendor/jquery/jquery.min.js",
        "vendor/chessboard/chessboard.min.js",
        "vendor/chessboard/chessboard.min.css",
        "assets/chessboard/wikipedia/*.png",
        "assets/pieces/*.svg",
        "vendor/stockfish/stockfish.js",
        "vendor/stockfish/stockfish.wasm"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    }
  ]
}