Examine source code of OETestet

{
  "manifest_version": 2,
  "name": "OETestet",
  "version": "3.1.0",
  "content_scripts": [
    {
      "matches": [
        "*://apo-portal.oesterreich-testet.at/*"
      ],
      "js": [
        "script.js"
      ]
    }
  ],
  "permissions": [
    "https://api.genderize.io/?name=USERNAME&country_id=AT"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{45a5e003-2af3-411a-87a4-5fffe75bff92}"
    }
  }
}