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.