Claude in Chrome extension stuck "not connected" after working earlier in same session

The Claude in Chrome extension worked correctly for an extended period earlier
in this session (dozens of successful browser tool calls — navigation,
screenshots, JS execution, network inspection). It then became unreachable
mid-session with no clear trigger, and has not reconnected since.

Error returned on every browser tool call since:
extension is installed and running (https://claude.ai/chrome), and that you
are logged into claude.ai with the same account as Claude Code."

Troubleshooting already attempted, all unsuccessful:

• Toggled the extension off and on in chrome://extensions
• Fully quit Chrome (Cmd+Q) and reopened it
• Re-logged into claude.ai in Chrome, confirmed same account as the Claude

Code session

• Confirmed Chrome itself is running normally (multiple renderer/extension

processes active via ps aux)

Environment:

• macOS (Darwin 23.6.0)
• Chrome (extension processes visible in ps aux, version 151.0.7922.170 per

Chrome Helper process paths)

• Claude Code CLI session, model claude-sonnet-5

Expected: the extension reconnects after a toggle/restart/re-login, as it
presumably should.
Actual: it remains permanently disconnected for the rest of the session
regardless of the above steps.