Related but different symptom from chat-scoped browser tabs: on 3.13.21 we also saw cross-workspace attachment — a project-workspace agent’s browser_tabs listed/controlled Home/empty-window Browser Tabs (stable-browser-session/<home-workspace-id>).
Filed: Agent browser_tabs attaches to Home/empty-window Browser Tabs from a different project workspace
Sibling reports from the same investigation:
- Cursor-ide-browser catalog/disk ready but CallMcpTool returns "server not found" (3.13.21 cold-start)
- Browser Automation Off still shows pages in Glass Browser Tab via open_resource
- When cursor-ide-browser is missing, agent falls back to system `open` and focuses Brave
- Agent browser_tabs attaches to Home/empty-window Browser Tabs from a different project workspace