Examine source code of GD.com Play Anything

{
  "manifest_version": 3,
  "name": "GD.com Play Anything",
  "version": "1.0",
  "description": "A simple extension that allows you to play any 1.0 level on the GeometryDash.com website",
  "permissions": [
    "storage",
    "scripting",
    "activeTab"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png"
    },
    "default_title": "Inject GD Level",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.geometrydash.com/*",
        "https://geometrydash.com/*"
      ],
      "js": [
        "patcher.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.geometrydash.com/*",
        "https://geometrydash.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start",
      "world": "ISOLATED"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "gdcom-play-anything@xeaf.dev",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}