[Plugin: Flexo Slider] Not working on firefox

Flexo Slider is very flexible. Works perfectly on Explorer and Chrome. Doesn’t work on Firefox. Here is a demo: http://beitlevav.co.il/%D7%9E%D7%A1%D7%A2%D7%93%D7%94-%D7%A6%D7%9E%D7%97%D7%95%D7%A0%D7%99%D7%AA. I would be happy to donate if someone finds a solution.

http://wordpress.org/extend/plugins/flexo-slider/