Examine source code of UUID Generator

{
  "manifest_version": 2,
  "name": "UUID-Gen",
  "version": "1.4",
  "description": "Simple UUID Generator",
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "UUID-Gen",
    "default_icon": {
      "16": "/icons/icon16.png",
      "32": "/icons/icon32.png",
      "192": "/icons/icon192.png",
      "512": "/icons/icon512.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "/icons/icon16.png",
    "32": "/icons/icon32.png",
    "192": "/icons/icon192.png",
    "512": "/icons/icon512.png"
  },
  "permissions": [
    "clipboardWrite",
    "contextMenus",
    "notifications"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e9fcd74-be27-4f5e-9a2c-d73fb7cabfc9}"
    }
  }
}