Examine source code of cuidaelRUT

{
  "manifest_version": 2,
  "name": "cuidaelRUT",
  "description": "Alerta a los usuarios cuando se les pide el RUT, recordándoles para que no lo entreguen si es que no es obligatorio.",
  "version": "2.0.2",
  "permissions": [
    "notifications"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "content.js"
      ],
      "exclude_matches": [
        "https://*.google.com/*",
        "https://*.google.cl/*",
        "https://*.wikipedia.org/*",
        "*://*.sii.cl/*",
        "*://*.github.com/*",
        "*://*.gob.cl/*",
        "*://*.cuidaelrut.cl/*"
      ],
      "run_at": "document_end"
    }
  ]
}