Examine source code of ShareToEbook

{
  "manifest_version": 3,
  "name": "ShareToEbook",
  "description": "Comparte las paginas que estas viendo con Kindle",
  "author": "Juan Luis Est.evez para Mosaico multimedia",
  "homepage_url": "https://mosaico-web.com",
  "version": "2.0.1",
  "icons": {
    "16": "icon/icon16.png",
    "48": "icon/icon48.png",
    "128": "icon/icon128.png"
  },
  "action": {
    "default_title": "ShareToEbook",
    "default_icon": "icon/icon19.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "scripting",
    "activeTab",
    "storage",
    "notifications"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "host_permissions": [
    "http://*/",
    "https://*/"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "sharetoebook@mosaico-web.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "personallyIdentifyingInfo",
          "websiteContent"
        ],
        "optional": []
      }
    }
  }
}