Firefox display problem

yes, it runs on the default themes. it even works inside an article on the same page. but not at that specific position of the theme. on firefox you just see a white blank area. on any other browser it works.

i used Random animation.

i found fix by changing the

.slideshow_container .slideshow_content {
position: relative !important;
overflow: hidden !important;
}

to

.slideshow_container .slideshow_content {
position: absolute !important;
overflow: hidden !important;
}

thanks