Just so you know, on Chrome, I get a huge red page warning that your site is known for phishing attacks. I'd highly recommend getting that checked out and fixed.
The same issue is at play with Firefox. If I try to load the following URL, it's blocked:
www.koechlin.net/components/com_jfbconne...es/jfbconnect.js?v=6
That's our Javascript file that must be included on the page. Since Firefox won't load it, some of our code won't work. There are other things like SqueezeBox that are throwing similar "Not defined" errors for the same reason.
I hope that helps you get started. It looks like you need to do a good cleaning of your content and get off some block lists.
Thanks,
Alex