Using openSUSE Leap 42.2 and KDE Frameworks 5 I've recently started using chromium as my default browser rather than firefox. Thunderbird is my email client, and I would like clickable links in email messages to open in chromium. However, every time I change these strings in the Thunderbird config network.protocol-handler.app.ftp;/usr/bin/firefox network.protocol-handler.app.http;/usr/bin/firefox network.protocol-handler.app.https;/usr/bin/firefox to point to /usr/bin/chromium the settings silently reset themselves to firefox. I have even uninstalled firefox, but it still happens. I have also changed my preferred browser in System Settings. What am I missing, or is this broken behaviour? If the latter, is it Thunderbird, KDE or openSUSE that is causing the problem? Bob -- Bob Williams System: Linux 4.4.36-5-default Distro: openSUSE 42.2 (x86_64) Desktop: KDE Frameworks: 5.26.0, Qt: 5.6.1 and Plasma: 5.8.2