[BUG] Claude in Chrome extension opens 4 unwanted tabs (native/, host/, wrapper/, script/) on every Chrome startup

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

When the Claude Chrome extension (v1.0.66) is enabled, Chrome opens 4 extra unwanted tabs on every startup:

• http://native/
• http://host/
• http://wrapper/
• http://script/

This happens on all Chrome profiles. Disabling the extension immediately stops the issue. Re-enabling it reproduces the issue instantly.

What Should Happen?

Chrome should start normally with only the user-configured startup pages, without opening these 4 extra tabs.

Error Messages/Logs

No error messages. The 4 tabs load as http://native/, http://host/, http://wrapper/, http://script/ and show "This site can't be reached" errors.

Steps to Reproduce

Steps to Reproduce

1. Install Claude Chrome extension (v1.0.66) from Chrome Web Store
2. Set up Claude Code native messaging host via /chrome command
3. Configure Chrome startup pages (Settings > On startup > Open specific pages)
4. Close Chrome completely
5. Reopen Chrome
6. 4 unwanted tabs (http://native/, http://host/, http://wrapper/, http://script/) appear alongside the configured startup pages

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.92 (Claude Code)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

Additional Information

• Chrome version: 146.0.7680.178
• Native messaging host is registered at: %USERPROFILE%\.claude\chrome\chrome-native-host.bat
• The native messaging host manifest is at: %APPDATA%\Claude Code\ChromeNativeHost\com.anthropic.claude_code_browser_extension.json
• The 4 words ("native", "host", "wrapper", "script") correspond to terms used in the native messaging host setup
• Chrome Preferences and Secure Preferences do not contain these URLs
• No Chrome group policies set startup URLs
• Chrome shortcuts have no extra command-line arguments
• Trend Micro Toolbar for Enterprise is also installed via policy but is not the cause (other users with the same toolbar do not have this issue)