Examine source code of Fominha NF-e Estoque

{
  "manifest_version": 3,
  "name": "Fominha NF-e Estoque",
  "version": "1.5.11",
  "description": "Consulta NF-e no Portal Nacional: captcha, emitente, produtos e validade (quando houver) para o estoque Fominha.",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Fominha NF-e",
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "storage",
    "scripting"
  ],
  "host_permissions": [
    "https://www.nfe.fazenda.gov.br/*",
    "https://nfe.fazenda.gov.br/*",
    "https://*.fominha.app/*",
    "http://localhost/*",
    "http://127.0.0.1/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.nfe.fazenda.gov.br/*",
        "https://nfe.fazenda.gov.br/*"
      ],
      "js": [
        "captcha-hide-lib.js",
        "emitente-lib.js",
        "parse-nfe.js",
        "content-sefaz.js"
      ],
      "css": [
        "captcha-only.css"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "https://*.fominha.app/*",
        "https://fominha.app/*",
        "http://localhost/*",
        "http://127.0.0.1/*"
      ],
      "js": [
        "content-fominha.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "fominha-nfe@fominha.app",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent",
          "websiteActivity"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}