Feature request: Support custom HTTP request headers in Codex App browser

Open 💬 0 comments Opened Jul 13, 2026 by Asilencer

Problem

Codex App's built-in browser is useful for authenticated workflows, debugging, and browser automation. However, it currently does not provide a way to modify HTTP request headers.

Proposed feature

Please consider adding support for configuring custom HTTP request headers in the built-in browser:

  • Add, replace, and remove request headers.
  • Apply rules by domain or URL pattern.
  • Enable or disable rules per browser session.
  • Provide a clear UI to review, edit, and reset configured rules.
  • Protect sensitive values such as authorization tokens and cookies.

Use cases

This would be useful for custom authentication, internal environment routing, API debugging, User-Agent testing, and enterprise web applications.

The scope of this request is limited to HTTP request headers; response header modification and browser extension installation are not required.

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