Hey, thanks for the report. This is a known issue. The same thing was already reported on Windows, and now it’s confirmed on macOS too.
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 Cursor’s main window.
- Or open
localhostdirectly in your regular browser.
If there are any updates, we’ll post them in the main thread. I’m closing this one as a duplicate.