HTML page converted looks different in anything that is not chrome

[NazaretRJ]

I am using PotreeConverter to convert a point cloud file (.las) into an html page. If i see the html file in chrome it looks great, however when i see it on firefox or in my QWebEngine View it looks bad. This is what is see on firefox and my QWebEngine:

Why? I need to open the html file with QWebEngine but it doesn't looks good. In stack overflow, people recomended me to ask here, since the problem is not directly related to QtWebEngine but also affects other browsers.

Thanks in advance

[NazaretRJ]

QWebEngine is based on Chromium