Hi, this Debian-bug looks like a sort of master BR.
There were several comments/reports on the debian-kde mailing-list. In my case Links are not opened in Firefox (default web-browser) when clicking in quassel IRC client. As a note: autotests need to be fixed as well, see my attached patch in the Link below. MATE check was commented as it is BROKEN when run. You can fold into d/p/debian-changes if you like. Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1088644#15 An interesting patch here: Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=1083074;filename=kde6.patch;msg=10 It elegantly fixes scripts/xdg-open.in and scripts/xdg-email.in. Most approaches to fix the issue cared about xdg-open only - what I have seen. I had no look into the 6 commits Patrick suggested as they point to... Link: https://gitlab.freedesktop.org/xdg/xdg-utils/ ...where I have no permission to look into. UPDATE: Today, I see:an Admin message: > Due to an influx of spam, we have had to impose restrictions on new accounts. > Please see this wiki page for instructions on how to get full permissions. > Sorry for the inconvenience. Alternatively - for followers: Link: https://cgit.freedesktop.org/xdg/xdg-utils/ Thanks for all the information and taking care with the will to provide a NMU upload. My 0,02€ Best regards, -Sedat-