Examine source code of 4Anime iFrame Remover

{
  "manifest_version": 2,
  "name": "4Anime iFrame Remover",
  "version": "1.0.0",
  "description": "Removes all iframes from the 4Anime website, improving page performance and security",
  "content_scripts": [
    {
      "matches": [
        "https://4anime.to/*"
      ],
      "js": [
        "app.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{513a1497-fcc5-40a4-b32e-8c7fe34e636b}"
    }
  }
}