Markers show up in Chrome but not in Firefox

Hi there,
thanks for this great Plugin. Our NGO strongly relies on it in order to educate on littering and pollution.

We have this new issue since 2 weeks:
The map on our main page (Plasti.ch) does show the dirty spots (green markers) in Chrome, but not in Firefox.
Our KML File looks like this (but with more markers).

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="https://www.opengis.net/kml/2.2" xmlns:gx="https://www.google.com/kml/ext/2.2" xmlns:kml="https://www.opengis.net/kml/2.2" xmlns:atom="https://www.w3.org/2005/Atom">
<Document>
  <name>Dreckspots</name>
    <Style id="base_pin">
      <IconStyle>
        <scale>1</scale>
        <Icon>
          <href>../../../../wp-content/plugins/osm/icons/mic_black_darling_10.png</href>
        </Icon>
        <hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
      </IconStyle>
    </Style>
     <Style id="report_pin">
      <IconStyle>
        <scale>1</scale>
        <Icon>
          <href>../../../../wp-content/plugins/osm/icons/mic_green_audio_01.png</href>
        </Icon>
        <hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
      </IconStyle>
    </Style>
    
 <Placemark>
   <name>Mittelkanal/Unterm Parkplatz</name>
   <description><![CDATA[<br />- sehr schmutzig <br />- sichere Schuhe und Handschuhe <br />- nur für Erfahrene]]></description>
   <styleUrl>#report_pin</styleUrl>
   <Point><coordinates>10.06044, 53.55012,0</coordinates></Point>
 </Placemark>
</Document>
</kml>

Do you have any idea on what might be the reason?
Many thanks!
Cheers,
Carl

• This topic was modified 2 years, 8 months ago by carlplastich.
• This topic was modified 2 years, 8 months ago by carlplastich.

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