Ide browser tool broken on react site testing

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Since the latest version the browser tool which now is not a popup but inside IDE is causing issues for automated testing. My website which uses react is now not clearly working with cursor IDE and is showcasing problems with react. However my personal browser works flawlessly as expected during manual testing.

Steps to Reproduce

the backend website which was working perfectly before and still now is showing errors in react form submissions, validations etc.

Expected Behavior

The cursor browser should be able to work perfectly.

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.39
VSCode Version: 1.105.1
Commit: 60d42bed27e5775c43ec0428d8c653c49e58e260
Date: 2025-11-27T02:30:49.286Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Linux x64 6.17.8-300.fc43.x86_64

For AI issues: which model did you use?

tried composer 1, opus 4.5, sonnet 4.5

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Hey, thanks for the report. Issues with the built-in IDE browser are a known problem, the team is aware. Especially with React apps: the browser interacts incorrectly with input fields, forms, and validation (submit stays disabled, state doesn’t update).

Similar: Cursor Browser (Browser Tab) doesn't work well with React Input - same React input issue with the browser tool there.

Could you please share:

  • Screenshot/video of the error when working with React forms
  • Browser console errors (right-click in IDE browser > Inspect > Console)
  • Logs from Help > Toggle Developer Tools > Console
  • What URL you’re opening (localhost:port?)
  • Which specific actions break (submit, onChange, clicks)

Temporary workaround: try opening in external Chrome instead of the built-in panel - check if it reproduces there.

Share the info and I’ll pass it to the team.

3

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