A while back someone mentioned the Viper Browser, and that it wouldn’t build as it required Qt6. I found however that the stable version 0.9.1 wil build using Qt5.
The build does have issues with the url suggestions, where you could only type 2 or 3 letters at a time, and have to move the mouse pointer to continue typing. I ended up removing the urlsuggestion code, and editing the URLLineEdit code. This resulted in it being able to type in a url without it stopping.