Examine source code of HotelScores

{
  "manifest_version": 3,
  "name": "HotelScores",
  "version": "1.0.0",
  "description": "Compare hotel ratings across Booking.com, Hotels.com, Google Maps, and more",
  "host_permissions": [
    "https://*.booking.com/*",
    "https://*.hotels.com/*",
    "https://*.expedia.com/*",
    "https://*.agoda.com/*",
    "https://qewzonfgdfkofzjtesln.supabase.co/*"
  ],
  "background": {
    "service_worker": "service-worker.js",
    "scripts": [
      "service-worker.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "hotelscores@stianmichael.gmail.com",
      "strict_min_version": "121.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.booking.com/hotel/*",
        "*://*.hotels.com/ho*",
        "*://*.hotels.com/hotel/*",
        "*://*.expedia.com/*-Hotel*",
        "*://*.expedia.com/Hotel*",
        "*://*.agoda.com/*hotel*",
        "*://*.agoda.com/*-Hotel*"
      ],
      "js": [
        "content.js"
      ],
      "css": [],
      "run_at": "document_idle"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  }
}