I can confirm what @anatoly.borodin reported is still the case: when the file BrowserApplication is set to does not exist the setting cannot be changed. Removing the line allowed me to set the application again in the system settings.
-- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to plasma-desktop in Ubuntu. https://bugs.launchpad.net/bugs/1878920 Title: Default KDE browser cannot be changed, "Apply" button is disabled To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-desktop/+bug/1878920/+subscriptions -- kubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
