SlideshowCK doesn't work with Firefox

Hello,

I noticed today that the slideshowCK is not displayed in Firefox.
Everything is fine in Google Chrome, Opera, Safari.
JS is enabled in Firefox. I've checked the css code in the webmaster tools on Chrome and Firefox, but find no mistake.
Also in the module settings I can not find a solution.
Does anyone have a tip for me?
Thanks in advance.

Link: www.crema.de

Hi
clear your browser cache, because I see the slideshow in my firefox
CEd