One last issue with "qupzilla-qt5-git", not able to play YouTube videos.
Note: no gtk2/gtk3
/usr/lib/qupzilla/libflashplayer.so
[ X ] Allow Flash plugin
Installed "kdeutils-kwalletmanager", works fine with Octopi (KDE su, add/remove).
EDIT: After installing "gst-plugins-bad" there is Sound but no Video.