[Windows] Chrome extension reconnect fails - page closes immediately

[pespinoza12]

When attempting to reconnect the Chrome extension from Claude Code, the browser opens clau.de/chrome/reconnect but
the tab closes/disconnects immediately without completing the authorization flow.

Environment

• OS: Windows 10 Pro 25H2 (Build 26200)
• Chrome: 144.0.7559.110 (Official Build) (64-bit)
• Claude Code: 2.1.30
• Extension ID: fcoeoabgfenejglbffodgkkbkcdhcgfn
• Node.js: v22.18.0

Steps to Reproduce

1. Run claude in terminal
2. Execute /chrome command
3. Status shows "Enabled" and "Installed" (green)
4. Select "Reconnect extension"
5. Chrome opens clau.de/chrome/reconnect
6. The page immediately closes/disconnects before authorization completes

What I Expected

The authorization flow should complete and connect the extension to Claude Code.

What Actually Happened

The reconnect page opens briefly then closes automatically. The extension never connects.

Troubleshooting Already Attempted

1. ✅ Reinstalled Chrome extension
2. ✅ Restarted Chrome completely (killed all processes)
3. ✅ Restarted Claude Code
4. ✅ Verified logged into claude.ai with same account
5. ✅ Manually created Native Messaging Host JSON file at:
   C:\Users\<user>\AppData\Local\Google\Chrome\NativeMessagingHosts\com.anthropic.claude_code.json
6. ✅ Added Windows Registry entry at:
   HKCU:\Software\Google\Chrome\NativeMessagingHosts\com.anthropic.claude_code
7. ✅ Verified chrome-native-host.bat exists at ~/.claude/chrome/

Relevant Debug Logs

Claude Code detects the extension correctly:
[Claude in Chrome] Found chrome profiles: Default
[Claude in Chrome] Detected browser: Google Chrome
[Claude in Chrome] Extension fcoeoabgfenejglbffodgkkbkcdhcgfn found in chrome Default

But when running the native host manually, got this error (suggesting connection issues):
[Claude Chrome Native Host] Creating socket listener: .\pipe\claude-mcp-browser-bridge-
[Claude Chrome Native Host] Socket server error: Error: listen EADDRINUSE: address already in use

Chrome Extension Console Errors

From chrome://extensions errors page:

• Uncaught (in promise) Error: Could not establish connection. Receiving end does not exist.
• Error: A listener indicated an asynchronous response by returning true, but the message channel closed before a response was received

Additional Context

The Native Messaging Host file was missing initially (empty NativeMessagingHosts folder). After manually creating
it, the issue persists.

[github-actions]

Found 3 possible duplicate issues:

1. Chrome integration: EADDRINUSE on Windows - MCP server and native host compete for named pipe #22669
2. [BUG] Chrome native host and Claude Code compete for same named pipe (EADDRINUSE on Windows) #21753
3. [BUG] Chrome MCP fails with EADDRINUSE: native host tries to create new pipe server instead of connecting to existing one #22651

This issue will be automatically closed as a duplicate in 3 days.

• If your issue is a duplicate, please close it and 👍 the existing issue instead
• To prevent auto-closure, add a comment or 👎 this comment

🤖 Generated with Claude Code

[pespinoza12]

duplicate of #22651

[github-actions]

This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.