macOS 27: ChatGPT Chrome extension installed but desktop app reports “Browser extension not installed”

ChatGPT/Codex desktop does not detect the official ChatGPT Chrome extension.
Environment

• macOS 27
• ChatGPT desktop: 26.915.31945
• ChatGPT Chrome extension: 1.26.901.11451
• Apple Silicon Mac
• Personal ChatGPT account
  Problem
  The official ChatGPT Chrome extension is installed and enabled in my Chrome profile and its side panel opens normally.
  However:
• ChatGPT → Settings → Computer Use → Google Chrome shows “Browser extension is not installed”.
• The Chrome side panel shows “Install the app to use ChatGPT in Chrome”.
• Reinstalling the extension from Computer Use does not change the status.
• Restarting Chrome and ChatGPT does not change the status.
• Chrome does not appear in the @ menu in a new Codex chat.
  I have only one ChatGPT.app installed in Macintosh HD → Applications.
  I also submitted /feedback.
  Feedback ID:
  no-active-thread-01a0b5ac-5eb8-78c2-b6bd-2846c8938050
  The built-in browser in the ChatGPT desktop app works normally. Ispunjeno

The report names no repository file, test, or entry point; it only describes the macOS desktop app and Chrome extension behavior. A contributor would first need to locate the desktop-to-Chrome integration and establish a reproducible test; done means the installed extension is detected and Chrome appears in the reported UI.