Cursor doesn't want to use browser to go to localhost

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I used the connection to the browser (chrome) so that the agent could evaluate its work in streamlit. (localhost:8501)
It stopped working for me in the middle of session. LLM was convinced, too, that it was not possible.

Steps to Reproduce

Just ask the agent to go to localhost and verify something I wanted it to do. Since the issue started occuring it happens for any localhost related question. External site work fine.

Expected Behavior

It would take screenshots, inspect the DOM, and decide what to change next in my code.

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.64
VSCode Version: 1.99.3
Commit: 25412918da7e74b2686b25d62da1f01cfcd27680
Date: 2025-11-06T04:35:14.424Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin x64 22.6.0

For AI issues: which model did you use?

Using OpenAI

For AI issues: add Request ID with privacy disabled

Not applicable, I guess?

Additional Information

Just to re-iterate. It worked fine before. It stopped around 15:00 CET today, in the middle of a session

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

I just restarted both cursor and chrome. it works (for now). So no error message, and no AI convinced it is impossible…. Still a very annoying bug, and I don’t know if this will not return.

3

Hey, thanks for the report. Glad restarting Cursor and Chrome fixed it for now.

Since this happened mid‑session and went away after a restart, it likely means the browser connection (Chrome DevTools Protocol) timed out or became unresponsive. This can be intermittent and we’re tracking similar reports.

If it happens again, please share:

  • Request ID (Chat context menu → Copy Request ID)
  • Any error messages in the chat/agent responses
  • Console errors (Help → Toggle Developer Tools → Console tab)

This will help the team investigate the root cause. Let me know if it recurs.

4

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