Examine source code of Travel Insight

{
  "name": "Travel Insight",
  "description": "Get instant key insights from travel sites: hotel phone number and official website",
  "version": "1.0.1",
  "manifest_version": 3,
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.min.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.booking.com/hotel/*"
      ],
      "js": [
        "booking.min.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "*://*.expedia.com/*",
        "*://*.expedia.com.my/*",
        "*://*.expedia.co.uk/*",
        "*://*.expedia.de/*",
        "*://*.expedia.fr/*",
        "*://*.expedia.ca/*",
        "*://*.expedia.com.au/*"
      ],
      "js": [
        "expedia.min.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    },
    "default_title": "Check hotel details"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "yourname@gmail.com",
      "strict_min_version": "109.0"
    }
  }
}