Examine source code of PageFrame

{
  "manifest_version": 2,
  "name": "PageFrame — Khung trang theo màu chủ đạo",
  "version": "1.0.0",
  "description": "Thêm khung viền dựa trên màu chủ đạo (neon / pastel / monochrome).",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "pageframe-9487193a@example.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "description": "This extension does not collect any user data."
      }
    }
  }
}