the new kde 5.13 has browser integration feature
i think there is a package to install, maybe this: https://github.com/KDE/plasma-browser-integration
but i cant find in netrunner
thanks
EDIT: i think it’s still in unstable, not in testing. i wait 
This is planned to come in Debian officially And is included in sid already: https://packages.debian.org/sid/plasma-browser-integration