Claude in Chrome: Extension crashes when executing javascript_tool or read_page on certain pages

Bug Description

The Claude in Chrome browser extension consistently crashes Chrome when attempting to use read_page or javascript_tool on the Luma notifications page (luma.com/notifications). The crash occurs immediately upon tool execution — even a lightweight JS call like document.body.innerText.substring(0, 5000) triggers it.

Steps to Reproduce

1. Connect to browser via switch_browser (works fine)
2. Get tab context via tabs_context_mcp (works fine)
3. User manually navigates a tab in the MCP group to https://luma.com/notifications
4. Attempt read_page or javascript_tool on that tab
5. Chrome crashes / extension disconnects

Environment

• OS: macOS (Darwin 24.6.0)
• Claude Code version: 2.1.52
• Browser: Chrome (work laptop)
• Extension: Claude in Chrome (latest)

What Works

• switch_browser — connects successfully every time
• tabs_context_mcp — returns correct tab info including the Luma URL
• tabs_create_mcp — works

What Crashes

• read_page on the Luma tab — crashes Chrome
• javascript_tool on the Luma tab — crashes Chrome
• navigate to luma.com — also caused crashes in earlier attempts

Additional Context

• Tried multiple times with fresh tab groups
• Tried varying depth parameter on read_page
• The Luma notifications page is a React SPA with dynamic content — may have a very large DOM
• The same extension works fine for switch_browser and tabs_context_mcp calls
• Home PC Chrome extension connects but has the same issue pattern (permission denied / disconnect after initial connection)

Expected Behavior

read_page and javascript_tool should execute without crashing Chrome, even on complex SPAs. If the page is too large, a graceful error/truncation would be preferred over a crash.