# Agent browser\_tabs attaches to Home/empty-window Browser Tabs from a different project workspace

**URL:** <https://forum.cursor.com/t/agent-browser-tabs-attaches-to-home-empty-window-browser-tabs-from-a-different-project-workspace/166856>\
**Category:** Bug Reports\
**Tags:** browser, mcp\
**Created:** [July 28, 2026, 11:20am UTC](https://forum.cursor.com/t/agent-browser-tabs-attaches-to-home-empty-window-browser-tabs-from-a-different-project-workspace/166856 "2026-07-28T11:20:38Z")\
**Posts on this page:** 1\
**Showing post:** 4

<div class="post-metadata">

**Author:** ![jsolly](https://sea3.discourse-cdn.com/cursor1/user_avatar/forum.cursor.com/jsolly/32/33752_2.png) [@jsolly](https://forum.cursor.com/u/jsolly)\
**Post date:** [July 28, 2026, 11:27am UTC](https://forum.cursor.com/t/agent-browser-tabs-attaches-to-home-empty-window-browser-tabs-from-a-different-project-workspace/166856/4 "2026-07-28T11:27:01Z")

</div>

## Follow-up: sanitized logs + session IDs + wrong-path ENOENT

Data sharing **on**. Strongest log evidence for cross-workspace browser / MCP FS bleed.

### Cross-workspace signals

1. From a **project** agent chat, browser viewId was `stable-browser-session/b23abea01bc4771017b008369920af3f` — that hex is the **Home/empty-window** workspaceId, not the project’s.
2. Project MCP FileSystem Writer (`workspaceId=c63b395f862a583cf684909c2973e535`) hit:  
`ENOENT … open '/Users/johnsolly/.cursor/projects/Users-johnsolly-cursor-worktrees-stocktextalerts-sfeo/mcps/cursor-ide-browser~staging/tools/browser_click.json'`  
i.e. tried to write `cursor-ide-browser` staging tools into a **third** project’s path (stocktextalerts worktree) while this chat was on jsolly-website.

### Session / identity (data sharing on)

- **machineId:** `45f9fb3f-e7a9-4793-a235-3a7bb93e4e3f`
- **Cursor:** 3.13.21 (`55434bd8062ece6fee083b82beed2aee42d253f0`) Darwin arm64
- **Log session folder:** `~/Library/Application Support/Cursor/logs/20260727T152911/`
- **Home/empty-window workspaceId:** `b23abea01bc4771017b008369920af3f`
- **Project workspaceId (writers):** `c63b395f862a583cf684909c2973e535`
- **empty-window composerId:** `d174e224-0460-47e0-9ea0-763af6aa41df`
- **jsolly-website composerId:** `5acf3d63-e855-475f-80d3-765ec4494774`
- **Sample requestIds (wb62 / this chat):** `ea519e6d-beca-48ec-a1cc-0f2014441f94`, `39c62806-5a07-4e7b-a817-a2f6b664a5c8`
- **Sample requestIds (wb58 / empty-window):** `01ecc7d9-bae9-4492-839d-1da5719701eb`, `5f3e45fc-f834-4f42-8e83-2e74cb80e63f`, `a85646b1-270f-459a-9cda-acc3b8fa91e0`

### Attachments focused on this bug

[00-SESSION-IDS.txt](https://forum.cursor.com/uploads/short-url/nle3VAszGvhrUJShzPemM2ZvByq.txt)  
[04-KEY-EXCERPTS.txt](https://forum.cursor.com/uploads/short-url/vSThW9XlNtI0hG7Ckc2nMkeWWCM.txt)  
[02-wb65-McpFileSystemWriter-ENOENT-wrong-path.log](https://forum.cursor.com/uploads/short-url/5iOjLhx7xptAvjPZOsf8Vmjncrs.log)  
[02-wb64-McpFileSystemWriter.log](https://forum.cursor.com/uploads/short-url/1Gn767dpysLdZeZ0AZH5x8OtOfm.log)  
[01-empty-window-wb58-McpFileSystemWriter-b23abe.log](https://forum.cursor.com/uploads/short-url/xbNqMp2zc1ETGCAIxlClv7Dp8bx.log)  
[cursor-browser-bugs-logs-sanitized.zip](https://forum.cursor.com/uploads/short-url/vpUM7jqnPgEZh2Ax7MNOjlWcyXV.zip)

Related: [166850](https://forum.cursor.com/t/166850), [165025](https://forum.cursor.com/t/165025), [166064](https://forum.cursor.com/t/166064).

---

_[View the full topic](https://forum.cursor.com/t/agent-browser-tabs-attaches-to-home-empty-window-browser-tabs-from-a-different-project-workspace/166856)._