Windows Codex Chrome plugin reinstall does not create native messaging host

Codex Chrome plugin issue on Windows

Environment:

• OS: Windows
• Codex app version visible in path: OpenAI.Codex_26.513.4821.0_x64__2p2nqsd0c76g0
• Chrome plugin cache: C:\Users\123\.codex\plugins\cache\openai-bundled\chrome\0.1.7
• Time checked: 2026-05-18T18:30:22+08:00

Problem:

• After reinstalling the Codex Chrome plugin from the Codex plugin UI, Codex still cannot connect to Chrome.
• Runtime error from Chrome backend: Browser is not available: extension
• Chrome Web Store page for the Codex Chrome Extension shows "Item not available".

Diagnostics:

• Missing native host manifest:

C:\Users\123\AppData\Local\OpenAI\extension\com.openai.codexextension.json

• Missing Windows registry key:

HKCU\Software\Google\Chrome\NativeMessagingHosts\com.openai.codexextension

• Expected host name:

com.openai.codexextension

• Expected extension ID:

hehggadaopoacecdllhhajmbjkdcmajg

• Expected allowed origin:

chrome-extension://hehggadaopoacecdllhhajmbjkdcmajg/

• check-extension-installed.js output:

Chrome user data directory does not exist: C:\Users\123\AppData\Local\Google\Chrome\User Data

Expected:

• Reinstalling the Chrome plugin should create the native messaging host manifest and HKCU registry key, then allow Codex to communicate with the Codex Chrome Extension.

Actual:

• The plugin entry is installed in Codex, but the native host manifest and registry key are not created, so Chrome automation remains unavailable.