I'm unable to observe the problem here. I created a Kubuntu 20.04 VM, and after installing the chromium snap, when opening the system settings I am able to set chromium as the default web browser, and apply the change. See attached screenshot.
** Attachment added: "VirtualBox_Kubuntu 20.04_15_05_2020_17_11_23.png" https://bugs.launchpad.net/ubuntu/+source/systemsettings/+bug/1878920/+attachment/5372155/+files/VirtualBox_Kubuntu%2020.04_15_05_2020_17_11_23.png ** Changed in: systemsettings (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to 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 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
