I want QWebEngineView to behave like chrome

Question

I am using a program called potreeConverter to convert a point cloud into an html page. If I see this page 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:

I want to see the same as in chrome in my QWebEngine. I tried to change the user agent, but nothing has changed.

The code:

QWebEngineProfile *profile = webEngineView_->page()->profile();
profile->settings()->setAttribute(QWebEngineSettings::JavascriptEnabled, true);
profile->setHttpUserAgent("Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36");

What can i do? Thanks in advance!