> Why would Firefox display mobile css rules on a desktop?

Why would Firefox display mobile css rules on a desktop?

Posted at: 2014-12-18 
I have built lots of websites... have never had this issue. The site looks decent in Chrome, and on a iphone, but Firefox is all messed up. It seems like it's picking up/reading the tablet size @media css... But it's even buggering that up?!?

The site in question is: http://magazine.agaaming.com (it's a work in progress)

Take a look with Chrome and Firefox, you'll see what I mean.

Thanks for any suggestions.

Oh, and the site is Wordpress based..