Examine source code of BuscaLibre Price Tracker

{
  "manifest_version": 2,
  "name": "BuscaLibre Price Tracker",
  "description": "Rastrea precios de libros en BuscaLibre",
  "version": "2.2.0",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "author": "erickandres30@gmail.com",
  "permissions": [
    "storage",
    "activeTab",
    "alarms",
    "notifications",
    "https://buscalibre.com/*",
    "https://www.buscalibre.com/*",
    "https://buscalibre.com.ar/*",
    "https://www.buscalibre.com.ar/*",
    "https://buscalibre.cl/*",
    "https://www.buscalibre.cl/*",
    "https://buscalibre.com.co/*",
    "https://www.buscalibre.com.co/*",
    "https://buscalibre.ec/*",
    "https://buscalibre.com.ec/*",
    "https://www.buscalibre.ec/*",
    "https://www.buscalibre.com.ec/*",
    "https://buscalibre.us/*",
    "https://www.buscalibre.us/*",
    "https://buscalibre.com.mx/*",
    "https://www.buscalibre.com.mx/*",
    "https://buscalibre.pe/*",
    "https://buscalibre.com.pe/*",
    "https://www.buscalibre.pe/*",
    "https://www.buscalibre.com.pe/*",
    "https://buscalibre.uy/*",
    "https://www.buscalibre.uy/*",
    "https://buscalibre.es/*",
    "https://www.buscalibre.es/*",
    "https://images.cdn1.buscalibre.com/*",
    "https://images.cdn2.buscalibre.com/*",
    "https://images.cdn3.buscalibre.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "BuscaLibre Price Tracker",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://buscalibre.cl/*",
        "*://buscalibre.com.ar/*",
        "*://buscalibre.com.co/*",
        "*://buscalibre.com.ec/*",
        "*://buscalibre.com.mx/*",
        "*://buscalibre.com.pe/*",
        "*://buscalibre.com/*",
        "*://buscalibre.ec/*",
        "*://buscalibre.es/*",
        "*://buscalibre.pe/*",
        "*://buscalibre.us/*",
        "*://buscalibre.uy/*",
        "*://www.buscalibre.cl/*",
        "*://www.buscalibre.com.ar/*",
        "*://www.buscalibre.com.co/*",
        "*://www.buscalibre.com.ec/*",
        "*://www.buscalibre.com.mx/*",
        "*://www.buscalibre.com.pe/*",
        "*://www.buscalibre.com/*",
        "*://www.buscalibre.ec/*",
        "*://www.buscalibre.es/*",
        "*://www.buscalibre.pe/*",
        "*://www.buscalibre.us/*",
        "*://www.buscalibre.uy/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "buscalibre-price-tracker@erickandres30.gmail.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}