[BUG] Screenshot and JavaScript tools fail with "Cannot access a chrome-extension:// URL of different extension"

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?

Bug: Screenshot and JavaScript tools fail with "Cannot access a chrome-extension:// URL of different extension"

Environment

• Platform: macOS Darwin 24.6.0
• Claude Code: (run claude --version to confirm)
• Chrome Extension: Claude in Chrome (verify version in chrome://extensions)

Issue

The screenshot and javascript_tool MCP tools consistently fail with:
Error capturing screenshot: Cannot access a chrome-extension:// URL of different extension

Meanwhile, read_page, navigate, wait, and find tools work correctly.

What Works vs. What Fails

| Tool | Uses | Status |
|-----------------|---------------------|----------|
| read_page | Accessibility tree | ✅ Works |
| navigate | Chrome tabs API | ✅ Works |
| wait | Timer | ✅ Works |
| find | Accessibility tree | ✅ Works |
| screenshot | chrome.debugger API | ❌ Fails |
| javascript_tool | chrome.debugger API | ❌ Fails |

Troubleshooting Attempted

1. ❌ Closed Next.js debugger/DevTools - no change
2. ❌ Full Chrome restart (Cmd+Q) - no change
3. ❌ Created fresh tabs - no change
4. ❌ Tried deployed HTTPS URL instead of localhost - no change

What Should Happen?

Chrome extension should be able to take screenshots and execute js

Error Messages/Logs

The screenshot and javascript_tool MCP tools consistently fail with:
  
Error capturing screenshot: Cannot access a chrome-extension:// URL of different extension

Steps to Reproduce

Steps to Reproduce

1. Start Claude Code with claude
2. Verify Chrome extension connected via /mcp
3. Navigate to any URL (tested both localhost:3001 and https://pockla-app-team-beta.vercel.app)
4. Attempt screenshot or javascript_tool action
5. Error occurs regardless of URL

Claude Model

Opus

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.76

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_