Claude in Chrome extension fails to connect from Cowork desktop session
Status Open
Maintainer reply None cached
Activity 0 comments · opened Aug 19, 2026
=== Environment ===
- Client: Claude desktop app (Cowork)
- Extension: Claude in Chrome
=== Steps taken ===
- Confirmed extension installed and signed into same account
- Enabled "Claude in Chrome" in Desktop Settings → Connectors
- Toggled it on in the conversation's Connectors dropdown
- Restarted extension / Chrome / desktop app
=== Result ===tabs_context_mcp consistently returns:
"Browser extension is not connected. Please ensure the Claude browser extension is installed and running..."
even though the extension is visibly active and navigated to pages (e.g. massagebook.com) in the same browser session.
=== Expected ===
MCP tools should connect to the already-active extension session.