sudo apt install qupzilla
works perfectly well.
Run Qupzilla, go to Help > About and you'll find the build date was in 2014.
How do I find that info from the command line before installing?
Application version 1.6.6
WebKit version 537.21
© 2010-2014 David Rosca
Build time: Sep 11 2014 17:14:39
Had I known this app was six years old I wouldn't have bothered.