Examine source code of EMOL Versión Oscura

{
  "description": "Transforma a Emol en un portal tono oscuro.",
  "manifest_version": 2,
  "name": "EMOL Black Version",
  "version": "1.1resigned1",
  "short_name": "EMOL Black Version",
  "icons": {
    "128": "e.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.emol.com/*",
        "*://tv.emol.com/*"
      ],
      "css": [
        "estilos.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5311bdb7-0dd2-420a-be9b-ccea030f99f7}"
    }
  }
}