Examine source code of Ticket Reader for Zendesk

{
  "manifest_version": 3,
  "name": "Ticket Reader for Zendesk",
  "version": "1.2.1",
  "description": "Lee y muestra los datos de tickets de Zendesk: asunto, prioridad y fecha de vencimiento.",
  "browser_specific_settings": {
    "gecko": {
      "id": "ticket-reader-for-zendesk@boghus.github.io",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "activeTab",
    "scripting",
    "clipboardWrite"
  ],
  "host_permissions": [
    "https://*.zendesk.com/*"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.zendesk.com/agent/tickets/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}