For Firefox, this looks like it's the fault of Firefox (or rather the firefox package) itself (I guess someone symlinked an icon again), see http://appstream.ubuntu.com/artful/main/issues/firefox.html
Krita on the other hand should show up, and I can see it. Can you check for that again? Maybe it was just temporarily unavailable. See http://appstream.ubuntu.com/artful/universe/metainfo/krita.html -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1748278 Title: Firefox and Krita (and possibly others) recently lost their AppStream metadata To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/appstream-generator/+bug/1748278/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
