Examine source code of navGPT

{
  "manifest_version": 3,
  "name": "navGPT",
  "version": "1.1",
  "description": "Extends ChatGPT webapp conversation navigation options",
  "content_scripts": [
    {
      "matches": [
        "https://chat.openai.com/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "./styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "navGPT@example.com"
    }
  }
}