Bug in Cursor's built-in simple web browser

Support Bug Reports
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Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Moving the built-in Simple Browser to a new window causes Cursor to crash and close completely. Reproducible every time.

Steps to Reproduce

Launch a web application by opening the built-in simple web browser, instead of using Chrome.
Once the browser window is opened as a tab in Cursor, select the tab, right-click and select “Move into New Window”.
The entire Cursor application will crash and close completely.

Expected Behavior

Simple browser is moved into a new window that is not within the Cursor IDE environment.

Operating System

Windows 10/11

Version Information

Version: 2.4.28 (system setup)
VSCode Version: 1.105.1
Commit: f3f5cec40024283013878b50c4f9be4002e0b580
Date: 2026-02-03T00:56:18.293Z
Build Type: Stable
Release Track: Default
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26300

For AI issues: which model did you use?

Not applicable. Haven’t even started to use any AI yet.

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

1 Like
3

Hey, thanks for the report. This is a known issue, there are already a few threads about it.

Main thread: Bug: Browser tab unresponsive after moving to new window (v2.4.22)

Current workaround:

  • Don’t move the Browser tab into a separate window, keep it in the main Cursor window
  • Or open localhost directly in a regular browser

If there are updates, they’ll show up in the main thread. I’m closing this thread as a duplicate.

4

A post was merged into an existing topic: Bug: Browser tab unresponsive after moving to new window (v2.4.22)