Pluggin disables hover from theme in firefox

Hi I’m using a theme from themetrust called hero,
Everything worked ok until I saw it on firefox, I seems to be messing up
my thumbnail mouse over in my homepage and portfolio page.
Can this be fixed?

I was also wondering if the lightbox images can be set to appear in a larger format when viewing it on a mobile phone screen.

Thank you beforehand!

http://wordpress.org/extend/plugins/fancybox-for-wordpress/