Examine source code of Notepad Extension

{
  "manifest_version": 3,
  "name": "Notepad Extension",
  "version": "2.1.0",
  "description": "Notepad Extension is a browser extension that allows users to save notes while browsing the web without switching tabs or windows.",
  "icons": {
    "16": "logo.png",
    "32": "logo.png",
    "48": "logo.png",
    "128": "logo.png"
  },
  "permissions": [
    "storage"
  ],
  "action": {
    "default_title": "Notepad Extension",
    "default_icon": "logo.png",
    "default_popup": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{29d70e7c-74d7-4e8c-b979-f1d8547a19c1}"
    }
  }
}