Whilst a download progresses, it seems impossible to use the Launch profile in new browser feature of about:profiles
Screen recording: https://photos.app.goo.gl/BTEUuAR7i5NJLEfd9
Is this expected?
Not a show-stopper, just an oddity. The workaround is simple enough: pause.
Waterfox 56.2.3 on FreeBSD-CURRENT.