CSS breaks in Firefox even after excluding CSS

NSFW (Sexual Health Education Site)

Hi,

The CSS is broken unfolding the top navigation menu and disabling main content sidebar separation. This happens in Firefox, not seen in Google Chrome and IE.

I haven’t activated Minify settings in W3 Total Cache.

I excluded the following files to no effect:

http://mydoctortells.com/wp-content/themes/twentytwelvechild/style.css/
http://mydoctortells.com/wp-content/themes/twentytwelve/style.css
http://mydoctortells.com/wp-includes/js/thickbox/thickbox.css
http://mydoctortells.com/wp-content/themes/twentytwelve/css/ie.css

The navigation js was also excluded.

http://mydoctortells.com/wp-content/themes/twentytwelve/js/navigation.js?ver=1.0

All my plugins and WordPress are updated.
I am using child theme for twentytwelve.
Kindly give your valuable time and guide me about what I should be doing.

Thanks.
Best,
Dr. Ashok Koparday

http://wordpress.org/extend/plugins/wp-minify/