Where does the bug appear (feature/product)?
Cursor IDE
Describe the Bug
Infinitely repeating warning in the chrome console inside of the new Cursor Browser in “Agent Window”. Also the cursor-integrated “Toggle Console” view is not showing any content, even though the Chrome devtools console view is showing content.
[BrowserAutomation] Setting up console overrides...
[BrowserAutomation] Setting up resource tracking...
[BrowserAutomation] Tracking 35 existing resources
[BrowserAutomation] Starting initialization...
[BrowserAutomation] Registering with MCP server...
[BrowserAutomation] Injection complete! Automation is ready.
Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('<URL>') does not match the recipient window's origin ('<URL>').
(anonymous) @ VM95:349
trackExistingResources @ VM95:330
(anonymous) @ VM95:419
(anonymous) @ VM95:1986
(anonymous) @ VM4 sandbox_bundle:2
(anonymous) @ VM4 sandbox_bundle:2
emit @ VM4 sandbox_bundle:2
onMessage @ VM4 sandbox_bundle:2
Steps to Reproduce
- Open localhost in local cursor browser window
- Click “Open Chrome Devtools”
- Check console log warnings (Currently at 3,000+ while writing this bug report)
Expected Behavior
- Excessive warnings should not appear (they do not appear in normal chrome)
- Content visible in devtools should appear in Cursor’s integrated console output via “Toggle Console”
Operating System
MacOS
Current Cursor Version (Menu → About Cursor → Copy)
Version: 1.7.28
VSCode Version: 1.99.3
Commit: adb0f9e3e4f184bba7f3fa6dbfd72ad0ebb8cfd0
Date: 2025-10-01T02:45:21.769Z (15 hrs ago)
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Darwin arm64 25.0.0
Does this stop you from using Cursor
Sometimes - I can sometimes use Cursor