Codex Chrome plugin reinstall does not create Chrome NativeMessagingHosts registry key on Windows
On Windows, the Codex Chrome plugin reinstall appears to create the native messaging manifest file and the extension host executable, but it does not create the required Chrome Native Messaging Host registry entry.
Observed
- Codex Chrome Extension is installed and enabled in Chrome.
- Manifest exists:
%LOCALAPPDATA%\OpenAI\extension\com.openai.codexextension.json
- Extension host executable exists under:
%USERPROFILE%\.codex\plugins\cache\openai-bundled\chrome\latest\extension-host\windows\x64\extension-host.exe
- Missing registry key:
HKCU\Software\Google\Chrome\NativeMessagingHosts\com.openai.codexextension
- Also not present under HKLM or Wow6432Node NativeMessagingHosts paths.
Result
The Chrome extension cannot communicate with the native host, and Codex Chrome connection fails during initialization.
Expected
Reinstalling the Codex Chrome plugin should register:
HKCU\Software\Google\Chrome\NativeMessagingHosts\com.openai.codexextension
with the default value pointing to:
%LOCALAPPDATA%\OpenAI\extension\com.openai.codexextension.json
Environment
- Windows
- Google Chrome installed
- Codex Chrome Extension version:
1.1.5_0
2 Comments
Potential duplicates detected. Please review them and close your issue if it is a duplicate.
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I reviewed the potential duplicates. This appears to be covered by the same Chrome plugin/native host provisioning issue tracked in #25874.
Small diagnostic difference from my report: in this case the manifest and extension host executable do exist, but the Chrome NativeMessagingHosts registry entry is still missing after reinstall:
HKCU\Software\Google\Chrome\NativeMessagingHosts\com.openai.codexextensionClosing this issue as a duplicate so the discussion can stay consolidated.