Description of problem: Mozilla Firefox was removed along with removing packages group kde-desktop-environment. Version-Release number of component: dnf.noarch 4.2.15-2.fc31 @updates Step to Reproduce: 'dnf -qy remove @kde-desktop-environment && dnf clean all'
The resolve the issue please run dnf group mark @workstation-product-environment. I suggest that your primary environment is Workstation. The issue will be fully resolved when instalation media will mark a single environment as installed. See: https://bugzilla.redhat.com/show_bug.cgi?id=1554010 *** This bug has been marked as a duplicate of bug 1554010 ***