Steps to reproduce the issue

Hi, every time I load any page of my web site I've got this error in Firebug:
GET -1 "NetworkError: 404 Category not found - http://aramis-voyage.fr/en/modules/mod_multimoo/js/-1" -1

You can see it on my site url : http://aramis-voyage.fr/en/

Expected result

Is it possible to fix this error ?

Actual result

Actually I get this error : GET -1 "NetworkError: 404 Category not found - http://aramis-voyage.fr/en/modules/mod_multimoo/js/-1" -1

System information (as much as possible)

System info: Joomla! 3.3.6 Stable
Joomla Platform 13.1.0 Stable

Additional comments

It takes 247ms to wait + 39ms to receive some result.

Best regards.