Examine source code of Fairbooking Direct

{
  "manifest_version": 2,
  "name": "Fairbooking Direct",
  "version": "0.0.5",
  "description": "L'extension FairBooking Direct vous facilite l'accès aux coordonnées directes des hôtels et hébergements de tourisme.",
  "permissions": [
    "management",
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "assets/js/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.booking.com/*",
        "*://*.tripadvisor.com/*",
        "*://*.tripadvisor.fr/*",
        "*://*.google.com/*",
        "*://*.google.fr/*"
      ],
      "js": [
        "lib/jquery-3.4.0.min.js",
        "assets/js/app.js"
      ],
      "css": [
        "assets/css/app.css"
      ]
    }
  ],
  "options_ui": {
    "page": "/options/options.html",
    "browser_style": true
  },
  "icons": {
    "16": "assets/img/icon/fairbooking-logo-16.png",
    "48": "assets/img/icon/fairbooking-logo-48.png",
    "128": "assets/img/icon/fairbooking-logo-128.png"
  },
  "web_accessible_resources": [
    "assets/img/*"
  ],
  "applications": {
    "gecko": {
      "id": "fairbooking-direct@fairbooking-direct.com"
    }
  }
}