Examine source code of Auto Copy Selectionc

{
  "manifest_version": 2,
  "name": "Auto Copy Selection",
  "version": "1.0",
  "description": "Tự động sao chép văn bản khi chọn.",
  "permissions": [
    "clipboardWrite"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a488363d-a227-4925-93cc-d34345aa7949}"
    }
  }
}