Gallery in Firefox issue

Hi!

I had a strange issue on Firefox browser lately.
My site Modula works well when I am logged in but the moment I logged out.
The Modula gallery started to all squashed together.
Is there any setting that I missed out?

The moment I logged it.
https://icedrive.net/0/74p7ljvmoL

And when I logged out.
https://icedrive.net/0/95GBT8oXLv

And this strange issue doesn’t appear in Chrome and Safri browser.

Thanks in advance
Elson

The page I need help with: [log in to see the link]