Examine source code of GNIB Junior - Andy666

{
  "manifest_version": 2,
  "name": "GNIB Junior - Andy666",
  "author": "Andy666 - George Anderson Lima Costa",
  "developer": {
    "name": "Andy666 - George Anderson Lima Costa",
    "url": "https://www.linkedin.com/in/george-anderson-lima-costa/"
  },
  "version": "5.4",
  "description": "Versao em API do sistema de GNIB",
  "applications": {
    "gecko": {
      "id": "GNIB_Junior@Andy666"
    }
  },
  "browser_action": {
    "default_title": "GNIB Junior - Andy666",
    "default_icon": "icons/border-48.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://developer.mozilla.org/",
    "*://www.eufuivocenao.com.br/*",
    "https://mdn.mozillademos.org/"
  ],
  "icons": {
    "16": "icons/border-16.png",
    "19": "icons/border-19.png",
    "24": "icons/border-24.png",
    "32": "icons/border-32.png",
    "38": "icons/border-38.png",
    "48": "icons/border-48.png",
    "64": "icons/border-64.png",
    "96": "icons/border-96.png",
    "128": "icons/border-128.png",
    "192": "icons/border-192.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://burghquayregistrationoffice.inis.gov.ie/Website/AMSREG/AMSRegWeb.nsf/*"
      ],
      "js": [
        "jquery-3.5.1.min.js",
        "main.js"
      ]
    }
  ]
}