/usr/ is in libqupzilla-dev 1.8.9~dfsg1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/
/usr/share/doc/
/usr/share/doc/libqupzilla-dev/
/usr/share/doc/libqupzilla-dev/copyright
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/include/
/usr/include/qupzilla/
/usr/include/qupzilla/datapaths.h
/usr/include/qupzilla/browserwindow.h
/usr/include/qupzilla/qzcommon.h
/usr/include/qupzilla/commandlineoptions.h
/usr/include/qupzilla/mainapplication.h
/usr/include/qupzilla/settings.h
/usr/include/qupzilla/proxystyle.h
/usr/include/qupzilla/autosaver.h
/usr/include/qupzilla/profilemanager.h
/usr/include/qupzilla/mainmenu.h
/usr/share/doc/libqupzilla-dev/changelog.Debian.gz
/usr/lib/x86_64-linux-gnu/libQupZilla.so