Juste for knowing if anyone has already achieved the Pass State as Props to Child Components’s course for React, since for me with Brave or Firefox it’s too long, then I can’t program on this step (it’s the only one which I’ve this on React’s course)
It kind of sounds like you might have an infinite loop which can happen if you try to render a component inside itself. I would suggest you clear your browser cache and see if that makes the challenge page load normally again.
It is more likely just because it’s in a browser with a clean cache. That, or you have some extensions installed in the two browsers that are interfering with the challenge.