codex - 💡(How to fix) Fix Browser Use blocks external and custom-host URLs with "cannot determine if ... is allowed" on macOS app [1 comments, 2 participants]

In the Codex macOS desktop app, Browser Use can control the in-app browser for explicit local URLs such as 127.0.0.1 and localhost, but it blocks public external URLs with an allow/preflight error. The error is: It fails with this allow/preflight style error: 2. surface a clearer permission prompt/error explaining which allow/preflight check failed. That issue reports a different low-level error on Windows, but it also points to Browser Use external navigation and site_status / allow preflight behavior.

TL;DR

The issue can be addressed by investigating and potentially modifying the allow/preflight checks in the Browser Use plugin to handle external URLs correctly.

Guidance

• Review the openai-bundled/browser-use/0.1.0-alpha1 plugin configuration to understand how it handles external URLs and allow/preflight checks.
• Check the site_status and preflight behavior discussed in the related GitHub issue (https://github.com/openai/codex/issues/19187) to see if it provides insight into the current issue.
• Test the Browser Use plugin with different external URLs to determine if the issue is specific to certain domains or all external URLs.
• Consider modifying the plugin to surface a clearer permission prompt or error message when an allow/preflight check fails.

Example

No code snippet is provided as the issue does not contain sufficient information to create a specific example.

Notes

The issue may be related to the Browser Use plugin's external navigation and site preflight behavior, but more investigation is needed to determine the root cause.

Recommendation

Apply a workaround by modifying the Browser Use plugin to handle external URLs correctly, as the root cause of the issue is likely related to the plugin's configuration or behavior.