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Codex Issues / #34528

Built-in browser plugin unavailable in Codex App on Windows

Open 💬 3 comments Opened Jul 21, 2026 by Tina-ting-ci
💡 Likely answer: A maintainer (github-actions[bot], contributor) responded on this thread — see the highlighted reply below.

What version of the Codex App are you using (From “About Codex” dialog)?

26.715.52143

What subscription do you have?

ChatGPT Plus

What platform is your computer?

Windows x64

What issue are you seeing?

Issue

The built-in browser is unavailable in Codex App.

In Settings → Integrations → Browser, the app displays:

Built-in browser plugin unavailable

There is no option to enable or install it. I also checked Settings → Computer Control. Only Microsoft Excel is available there; Google Chrome is not listed.

Because the browser plugin is unavailable, Codex tasks do not receive a browser-control tool and cannot launch or control a browser.

Expected behavior

The built-in browser plugin should be available, or the app should clearly explain why it is unavailable and how to enable/install it.

Environment

  • Codex App version: 26.715.52143
  • Platform: Windows x64
  • Feedback ID: 019f8479-259e-7541-89b3-936b8dbc5057

Screenshots

Attached:

  1. Settings → Browser showing “Built-in browser plugin unavailable”
  2. Settings → Computer Control showing only Microsoft Excel

<img width="1837" height="1157" alt="Image" src="https://github.com/user-attachments/assets/8f7342a5-319e-40f1-ad67-69938aece69b" />

<img width="565" height="357" alt="Image" src="https://github.com/user-attachments/assets/d4fe556c-53a9-455d-bc99-eb8f2e9c036d" />

<img width="1300" height="1052" alt="Image" src="https://github.com/user-attachments/assets/c63e3cb6-c7fb-495d-924d-04347fc6ce9d" />

What steps can reproduce the bug?

Feedback ID: 019f8479-259e-7541-89b3-936b8dbc5057

What is the expected behavior?

The built-in browser plugin should be available and a Codex task should receive a browser-control tool, allowing it to launch and control the in-app browser. If the feature is unavailable for this account or environment, the app should show the specific reason and actionable instructions to enable it.

Additional information

_No response_

View original on GitHub ↗

3 Comments

github-actions[bot] contributor · 1 month ago

Potential duplicates detected. Please review them and close your issue if it is a duplicate.

  • #33660

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likenallscriptures-admin · 7 days ago

I’m seeing a Browser plugin version mismatch on Windows after updating Codex.
Environment:

  • Codex/Chrome plugin build: 26.818.22352
  • Browser plugin downloaded after disable/re-enable: 26.814.41407
  • Windows desktop app

Browser initialization fails with:
Cannot find module
C:\Users\<username>\.codex\plugins\cache\openai-bundled\browser\26.818.22352\scripts\browser-service.mjs
Troubleshooting performed:

  1. Updated Codex.
  2. Uninstalled and reinstalled Browser.
  3. Fully exited and reopened Codex.
  4. Removed and reinstalled the ChatGPT Chrome extension.
  5. Deleted both stale Browser cache directories:
  • personal\browser\26.814.41407
  • openai-bundled\browser\26.814.41407
  1. Restarted Codex and disabled/re-enabled Browser.

Codex downloaded only personal\browser\26.814.41407 again. It did not download the required openai-bundled\browser\26.818.22352 package. Both in-app Browser and Chrome control therefore fail during initialization.
This appears to be an upstream Browser plugin delivery/version-alignment problem rather than a local configuration or extension problem.

likenallscriptures-admin · 7 days ago

Resolved locally. The problem was caused by Codex enabling [plugins."browser@personal"], which repeatedly installed stale Browser build 26.814.41407. The bundled marketplace already contained the correct build 26.818.22352.

Changing the configuration entry to [plugins."browser@openai-bundled"], removing the stale personal Browser cache, and restarting Codex allowed the correct package to materialize. Both the in-app Browser and Chrome extension control now work.