Gallery export display problems in some browsers

I have built Photoswipe gallery in Exhibeo, containing 15 images.
When it is exported and placed into X-Way, all 15 images show on the X-Way page workspace.
However, when viewed in Firefox on my Mac only 11 images are visible on the page – but all are viewable when scrolling through the gallery.
There is no display problem in Chrome or Safari.

However titles and captions in the latest version of Chrome are gobbledegook. A Google web font is used – and displays perfectly in the other 2 browsers.

Hi SteveS,

Can you share a link to a page that shows these problems?