@velox: I started looking into https://invent.kde.org/jbbgameich/plasma-angelfish

Some issues are filed and will work on resolving them. It does require one more account as is sits behind kde.org

Compared to other QtWebengine browsers (Falkon mainly), its significantly simpler and probably lacks in functions. However, choice of QML-based browsers is rather limited (https://mglapps.frama.io/). I found only Angelfish, Qt Demo browser and Liri. Working with Angelfish as it's plain KDE and does not have some other exotic requirements as Liri (https://liri.io/apps/browser/) and Angelfish is developed with the focus on mobile.

If there is a better choice, now its a good time to voice it