Examine source code of FomRGT

{
  "manifest_version": 2,
  "name": "FomRGT",
  "version": "0.2",
  "description": "Consulta al Registro de Empresas y Actividades de Transporte",
  "icons": {
    "16": "icons/rgt16.png",
    "32": "icons/rgt32.png",
    "48": "icons/rgt48.png",
    "96": "icons/rgt96.png",
    "128": "icons/rgt128.png"
  },
  "browser_action": {
    "default_icon": "icons/rgt32.png",
    "default_title": "Ve a la consulta del ministerio"
  },
  "content_scripts": [
    {
      "matches": [
        "*://apps.fomento.gob.es/*"
      ],
      "js": [
        "filtro.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "activeTab"
  ],
  "web_accessible_resources": [
    "icons/rgt96.png"
  ]
}