Examine source code of Chollometro

{
  "manifest_version": 3,
  "name": "PrecioReal by Chollometro",
  "version": "2.0.10",
  "description": "De la mano de Chollometro: compara precios en tiempo real, consulta el historial de precios y recibe alertas de bajadas de precio.",
  "browser_specific_settings": {
    "gecko": {
      "id": "tech@chollometro.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "authenticationInfo",
          "browsingActivity",
          "websiteContent",
          "websiteActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "PrecioReal"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "exclude_matches": [
        "*://chollometro.com/*",
        "*://*.chollometro.com/*",
        "*://amazon.ae/*",
        "*://*.amazon.ae/*",
        "*://amazon.ca/*",
        "*://*.amazon.ca/*",
        "*://amazon.cn/*",
        "*://*.amazon.cn/*",
        "*://amazon.co.jp/*",
        "*://*.amazon.co.jp/*",
        "*://amazon.co.uk/*",
        "*://*.amazon.co.uk/*",
        "*://amazon.co.za/*",
        "*://*.amazon.co.za/*",
        "*://amazon.com/*",
        "*://*.amazon.com/*",
        "*://amazon.com.au/*",
        "*://*.amazon.com.au/*",
        "*://amazon.com.be/*",
        "*://*.amazon.com.be/*",
        "*://amazon.com.br/*",
        "*://*.amazon.com.br/*",
        "*://amazon.com.mx/*",
        "*://*.amazon.com.mx/*",
        "*://amazon.com.tr/*",
        "*://*.amazon.com.tr/*",
        "*://amazon.de/*",
        "*://*.amazon.de/*",
        "*://amazon.eg/*",
        "*://*.amazon.eg/*",
        "*://amazon.es/*",
        "*://*.amazon.es/*",
        "*://amazon.fr/*",
        "*://*.amazon.fr/*",
        "*://amazon.ie/*",
        "*://*.amazon.ie/*",
        "*://amazon.in/*",
        "*://*.amazon.in/*",
        "*://amazon.it/*",
        "*://*.amazon.it/*",
        "*://amazon.nl/*",
        "*://*.amazon.nl/*",
        "*://amazon.pl/*",
        "*://*.amazon.pl/*",
        "*://amazon.sa/*",
        "*://*.amazon.sa/*",
        "*://amazon.se/*",
        "*://*.amazon.se/*",
        "*://amazon.sg/*",
        "*://*.amazon.sg/*",
        "*://lenovo.com/configurator/*",
        "*://*.lenovo.com/configurator/*",
        "*://lenovo.com/*/configurator/*",
        "*://*.lenovo.com/*/configurator/*"
      ],
      "js": [
        "price-extraction-rules.js",
        "content.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "*://amazon.ae/*",
        "*://*.amazon.ae/*",
        "*://amazon.ca/*",
        "*://*.amazon.ca/*",
        "*://amazon.cn/*",
        "*://*.amazon.cn/*",
        "*://amazon.co.jp/*",
        "*://*.amazon.co.jp/*",
        "*://amazon.co.uk/*",
        "*://*.amazon.co.uk/*",
        "*://amazon.co.za/*",
        "*://*.amazon.co.za/*",
        "*://amazon.com/*",
        "*://*.amazon.com/*",
        "*://amazon.com.au/*",
        "*://*.amazon.com.au/*",
        "*://amazon.com.be/*",
        "*://*.amazon.com.be/*",
        "*://amazon.com.br/*",
        "*://*.amazon.com.br/*",
        "*://amazon.com.mx/*",
        "*://*.amazon.com.mx/*",
        "*://amazon.com.tr/*",
        "*://*.amazon.com.tr/*",
        "*://amazon.de/*",
        "*://*.amazon.de/*",
        "*://amazon.eg/*",
        "*://*.amazon.eg/*",
        "*://amazon.es/*",
        "*://*.amazon.es/*",
        "*://amazon.fr/*",
        "*://*.amazon.fr/*",
        "*://amazon.ie/*",
        "*://*.amazon.ie/*",
        "*://amazon.in/*",
        "*://*.amazon.in/*",
        "*://amazon.it/*",
        "*://*.amazon.it/*",
        "*://amazon.nl/*",
        "*://*.amazon.nl/*",
        "*://amazon.pl/*",
        "*://*.amazon.pl/*",
        "*://amazon.sa/*",
        "*://*.amazon.sa/*",
        "*://amazon.se/*",
        "*://*.amazon.se/*",
        "*://amazon.sg/*",
        "*://*.amazon.sg/*"
      ],
      "js": [
        "amazon-content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "declarativeNetRequest",
    "storage"
  ],
  "host_permissions": [
    "https://precioreal.com/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules.json"
      }
    ]
  }
}