Firefox Bug

Used theme : Vintage Immersed

Hi, first of all, thank you for sharing this grat plugin. It corresponds exactly to what we needed for our project.
Infortunately whe generating maps under Firefox, they appear beside the post container div getting though the navigation bar and out of the page.
However it perfectly works under IE and Google Chrome.
Is there anything to do to make it be well displayed on FF?

THanks

https://wordpress.org/plugins/ideal-interactive-map/