Examine source code of Libri Top

{
  "manifest_version": 2,
  "name": "Libri Top",
  "short_name": "LibriTop",
  "homepage_url": "https://www.libritop.it/",
  "description": "I migliori libri selezionati per te",
  "version": "1.1",
  "background": {
    "scripts": [
      "event.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "Libri Top",
    "default_popup": "popup.html"
  },
  "permissions": [
    "https://www.libritop.it/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2e89076-f03f-4ff1-b02d-8694fda13910}"
    }
  }
}