Maps no longer shown on Windows 10 / Firefox

just found a problem: my KML-Maps are no longer displayed on Windows 10 / Firefox, do not know if caused by latest Firefox or Zh GoogleMap.

Typical map example: map on the right of the text on
familie-abderhalden.ch/index.php/reisen/nordsee/2015-norwegen

Maps still are shown on Windows 10 / Microsoft Edge and on IOS / Firefox 23 for IOS.

Windows 10: is up-to-date

Firefox for Windows causing problem: 75.0 (64-Bit)

Zh GoogleMap Version:
Package 11.1.1.0 Status Zh GoogleMap Package
Component 11.1.1.0 Status Zh GoogleMap
Module 6.1.0.0 Status Zh GoogleMap Module
Plugin 6.1.0.0 Status Zh GoogleMap Plugin

What can I do?

I replied you in message. I can see your map with KML. Try to clear browser cache.

Thank you for quick answer.
Shame on me If somethink does not work at two in the morning it would be better to go to sleep and rethink next morning before asking for help....

Sometimes the same I got