Au lieu d’utiliser une iframe
:
<div id="pym_embed_f100">
</div>
<script type="text/javascript">
window.addEventListener("DOMContentLoaded", function(){
var pymParent = new pym.Parent("pym_embed_f100", "https://labs.letemps.ch/forum-des-100/trombines-2019/", {});
}, false );
</script>