nia I saw the comment. Yes, founding annulen could be a solution but, porting qtwebengine also. I know, ...it's a huge mess. Just looking at FreeBSD's amount of patches makes me sick.
The thing is, I've installed Alpine on bare metal just to check and, the browser works much smoother with qtwebengine than it does with qtwebkit ...actually, in general, anything webkit based "eats" my cpu in a way, that makes it nearly unusable.