Chris Martinez11,715 Points
my preview screen in the challenges hasn't been rendering differently.
I'm using firefox and chrome (depending one what computer i'm working on), and i am still passing these challenges, but the preview screen isn't showing a different rendering the page any differently. when on firefox, i'm using the vendor prefix to preview, and it has worked in the past, but the animation and responsive web design pages don't show up any different as i add code. any idea why this is happening?
I know it's been quite a while since you posted this, so you've likely solved this by now, but if you haven't, I'll be glad to help.