I haven't managed to fix the GUI, but I did manage to fix the rest of the dysfunction by manually editing `mimeapps.list` and running `kbuildsycoca5`.
My best guess is that, when the value in lines like `x-scheme- handler/http=firefox.desktop;` doesn't exist, KDE synthesizes a fallback chain, and kde-open5 and xdg-desktop-portal-kde disagreed on the ordering of the synthesized fallback chain. The GUI still resets to like in the screenshot though. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1946920 Title: Default Applications > Web Browser is non-functional To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plasma-desktop/+bug/1946920/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
