Here's the heading and slide-out menu I am working on: http://computerdirectoutlet.com/CDOBiz/
In Chrome and IE, the fixed menu will slide properly when the menu is expanded, but in Firefox it stays fixed over the menu. Any idea how I can fix this issue?
I'm using the mmneu jquery plugin
Try adding the "mm-fixed-top" class to your #header element:
<div class="mm-fixed-top" id="header">