FooGallery not responsive in Firefox (and IE)

I installed FooGalley and FooBox on my website. When I open it in Safari or Chrome the pictures look fine, but in Firefox, and apperently in IE as well, the picture is running thru the sidebar. Off course I can set the standard wit but then it still does not respond when I make my window smaller. So somehow I think the responsiveness doesn’t work for those browsers. BTW. I am using the Avada theme.

Anyone a solution?

https://www.ads-software.com/plugins/foogallery/