For anyone else still trying to get konsole to open URLs in a browser (as if it would be safe to open them anywhere else), without solving the mystery of which packages you need to bring in for `kcmshell5 componentchooser`, I think the sufficient incantation (tested on stretch) is to:
Add to ~/.config/kdeglobals: [General] BrowserApplication[$e]=!/usr/bin/google-chrome and start a new konsole where it will take effect.
