Examine source code of Spoof Me

{
  "manifest_version": 3,
  "name": "Spoof Me",
  "version": "1.2.4",
  "description": "Spoof your browser fingerprint: user agent, language, timezone, and more.",
  "author": "Shyngys Shynbolatov",
  "homepage_url": "https://blockhacks.io",
  "permissions": [
    "storage",
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess",
    "tabs",
    "activeTab"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "service_worker": "background/service-worker.js",
    "type": "module",
    "scripts": [
      "background/service-worker.js"
    ]
  },
  "action": {
    "default_popup": "popup/popup.html",
    "default_title": "Spoof Me"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/spoof-injector.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/spoof-runtime.js"
      ],
      "run_at": "document_start",
      "world": "MAIN",
      "all_frames": true
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "shyngys@blockhacks.io",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}