Claude Chrome extension v1.0.69 service worker fails to boot — "not connected" across all surfaces

Claude browser extension installs successfully but the service worker never enters running state, so no Anthropic surface can connect to it.

Environment

• macOS 14 (Darwin 25.2.0)
• Chrome 147.0.7727.116
• Claude Code 2.1.121
• Extension version: 1.0.69
• Extension ID: fcoeoabgfenejglbffodgkkbkcdhcgfn
• Profile 1 active, signed into claude.ai

Symptoms

• Claude Code MCP claude-in-chrome returns "Browser extension is not connected"
• Claude.ai list_connected_browsers returns "Still not reachable"
• Chrome's Secure Preferences shows the extension entry with state: None and empty disable_reasons (typical fingerprint of a service-worker boot failure)

Steps tried (all failed)

1. Reinstall extension from Chrome Web Store
2. Full Chrome restart (Cmd+Q, reopen)
3. Toggle extension off/on in chrome://extensions
4. Switched between Chrome profiles
5. Verified native messaging host JSONs are registered for both com.anthropic.claude_browser_extension and com.anthropic.claude_code_browser_extension
6. Verified native host binary launches and creates socket when invoked manually

Expected

Extension service worker boots, MCP / list_connected_browsers returns the device.

Actual

"Not connected" on every surface.