claude-code - 💡(How to fix) Fix tabs_context_mcp returns "Browser extension is not connected" despite correct setup [1 comments, 2 participants]

Environment

• OS: Windows 11 Pro 10.0.26200
• Claude Code: CLI (claude.exe at C:\Users...local\bin\claude.exe)
• Chrome extension ID: fcoeoabgfenejglbffodgkkbkcdhcgfn
• Extension status: installed, enabled, logged in with same account

What's configured correctly

• Native messaging host registered in registry: HKCU\Software\Google\Chrome\NativeMessagingHosts\com.anthropic.claude_code_browser_extension
• Manifest JSON exists at: C:\Users<user>\AppData\Roaming\Claude Code\ChromeNativeHost\com.anthropic.claude_code_browser_extension.json
• .bat wrapper exists at: C:\Users<user>.claude\chrome\chrome-native-host.bat
• allowed_origins in manifest matches installed extension ID

What happens

Every call to mcp__claude-in-chrome__tabs_context_mcp returns: "Browser extension is not connected. Please ensure the Claude browser extension is installed and running (https://claude.ai/chrome)..."

Steps to reproduce

1. Install Claude Code CLI on Windows
2. Install Chrome extension (ID: fcoeoabgfenejglbffodgkkbkcdhcgfn)
3. Log in with same account in both
4. Run any claude-in-chrome MCP tool → "not connected"

Expected behavior

Tools connect successfully and return tab context.