Examine source code of DownloadGPT

{
  "manifest_version": 3,
  "name": "DownloadGPT",
  "version": "1.0",
  "description": "Download ChatGPT conversations.",
  "permissions": [
    "activeTab"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "downloadgpt@krishi-sw.dev"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.chatgpt.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "css": [
        "popup.css"
      ]
    }
  ],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; object-src 'none';"
  }
}