Examine source code of Lastminuteclick

{
  "name": "Lastminuteclick",
  "description": "Scarica l'estensione di Lastminuteclick per confrontare immediatamente i prezzi delle vacanze e risparmiare fino al 20%",
  "browser_specific_settings": {
    "gecko": {
      "id": "browser@lastminuteclick.it"
    }
  },
  "version": "1.0",
  "permissions": [
    "activeTab",
    "scripting",
    "tabs",
    "background",
    "storage"
  ],
  "host_permissions": [
    "https://www.lastminuteclick.it/*",
    "https://new.lastminuteclick.it/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "popup.js",
        "popup.html",
        "content.js",
        "open.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "action": {
    "default_title": "Lastminuteclick"
  },
  "content_scripts": [
    {
      "js": [
        "Library/jquery.min.js",
        "Library/jquery-ui.min.js",
        "TourOperator/Alpitour.js",
        "TourOperator/OtaViaggi.js",
        "TourOperator/Alltours.js",
        "TourOperator/Costacrociere.js",
        "TourOperator/Crocierissime.js",
        "TourOperator/Edenviaggi.js",
        "TourOperator/Evvai.js",
        "TourOperator/Francorosso.js",
        "TourOperator/Hoescape.js",
        "TourOperator/Lastminute.js",
        "TourOperator/Logitravel.js",
        "TourOperator/Msccrociere.js",
        "TourOperator/Turisanda.js",
        "TourOperator/Yallayalla.js",
        "TourOperator/Yesvacanze.js",
        "content.js"
      ],
      "matches": [
        "https://www.lastminuteclick.it/disabled/*",
        "https://new.lastminuteclick.it/disabled/*",
        "https://www.alpitour.it/vacanze/*",
        "https://www.yallayalla.it/dettaglio/*",
        "https://www.edenviaggi.it/hotels/*",
        "https://www.francorosso.it/*",
        "https://www.turisanda.it/hotel/*",
        "https://www.alltours.it/estero/*",
        "https://www.alltours.it/calabria/*",
        "https://www.alltours.it/campania/*",
        "https://www.alltours.it/puglia/*",
        "https://www.alltours.it/sicilia/*",
        "https://www.alltours.it/sardegna/*",
        "https://www.alltours.it/mare-italia/*",
        "https://www.it.lastminute.com/*",
        "https://www.yesvacanze.com/risultati-ricerca*",
        "https://www.evvai.com/vacanza/*",
        "https://www.logitravel.it/packagesasyncstepssp/BookingDetailsMaterial*",
        "https://www.otaviaggi.com/holiday/*",
        "https://www.hoescape.com/preventivo_prenotazione/*",
        "https://www.msccrociere.it/Booking*",
        "https://www.crocierissime.it/offerta-crociere/*",
        "https://www.costacrociere.it/summary*"
      ]
    }
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "manifest_version": 3
}