Examine source code of Funny URL Rewriter

{
  "manifest_version": 2,
  "name": "Funny URL Rewriter",
  "version": "1.0",
  "description": "Biến URL dài dòng thành câu hài hước mỗi khi copy.",
  "permissions": [
    "clipboardWrite",
    "clipboardRead",
    "activeTab",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{827f75ac-b28e-4c2f-ae8d-0baeacbb8de9}"
    }
  }
}