Display of MegaMenu OK on Chrome but not on Firefox

Hello,

Here's the link www.staging1.pgsoftware.fr/
Chrome : click on "Reseau" and "Applications" display specific menu and module for each
Firefox : "Applications" displays menu and modules of "Reseau" AND "Applications"

Do you need credentials in private ?

I have another question about design, how can I send you images ?

Best regards.

Dear jean,
Thank you for using our product.
Please give me link your site and your account of the administrator via mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
I will check code on your site,
Thank you so much for empathy