Examine source code of Extractor de Montos

{
  "manifest_version": 2,
  "name": "Extractor de Montos",
  "version": "1.0",
  "description": "Extrae montos negativos de transferencias enviadas y recibidas para una fecha específica.",
  "permissions": [
    "activeTab",
    "tabs",
    "https://claropay.com.ar/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon.png"
    }
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://claropay.com.ar/Movimientos"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b4db0824-beb4-4eda-b0f6-8c092ffdfa40}"
    }
  }
}