Examine source code of ChatGPT to PDF

{
  "manifest_version": 3,
  "version": "4.4",
  "homepage_url": "https://chatgptpdf.tech/welcome",
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "default_locale": "en",
  "action": {
    "default_title": "__MSG_appName__",
    "default_icon": {
      "16": "extension_icon16.png",
      "32": "extension_icon32.png",
      "48": "extension_icon48.png",
      "128": "icon.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://chatgptpdf.tech/*"
  ],
  "icons": {
    "16": "extension_icon16.png",
    "32": "extension_icon32.png",
    "48": "extension_icon48.png",
    "128": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://chatgpt.com/*"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_start"
    }
  ],
  "author": "ChatGPT To PDF",
  "browser_specific_settings": {
    "gecko": {
      "id": "chatgpttopdf@kt.extensions",
      "strict_min_version": "109.0"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}