jQuery conflict in theme

Hello,

I’m using a theme for a customer. But since the beginning I installed the theme, there are some problems with an shortcode that comes with the theme and Firefox. The function is called: “circle navigation”, right above the footer, when you hover on the 3 images.

This is the url: https://www.lijnm.com

After I used element inspection, the console showed the following error (I’m sorry, this is in Dutch):

[09:13:50.236] Gebruik van getPreventDefault() wordt niet meer ondersteund. gebruik in plaats daarvan defaultPrevented. @ https://www.lijnm.com/webdesign/wp-includes/js/jquery/jquery.js?ver=1.10.2:4

Does anyone know if I can fix this myself?
Note: in the demo version from the developer of the theme, this error is also there.
2nd Note: Firefox is the only browser with this error..

Thanks in advance!

Michelle