I am having problem with css media query in Firefox. It works correct in Chrome like I made two DIVs and want a scrollbar. If I decrease the screen size of firefox upto 800px then both DIVs collapse and after some pixels media query works but that not happens in Chrome.
check this fiddle http://jsfiddle.net/RMvqC/2/
Firefox & Webkit based browsers render the scrollbar differently. In Firefox, MediaQuery considered width of scrollbar which is 15px with the screen width, but in Webkit based browsers it’s not considered scrollbar with the screen width. So, that’s why the floated DIVs are collapsed in Firefox.
I did some stuff with css may be that’s help you. (check this fiddle)