Equivalent to that bug of fc20, but now for fc21 https://bugzilla.redhat.com/show_bug.cgi?id=1160371
mozilla-fira-fonts-3.111-2.fc21 has been submitted as an update for Fedora 21. https://admin.fedoraproject.org/updates/mozilla-fira-fonts-3.111-2.fc21
Package mozilla-fira-fonts-3.111-2.fc21: * should fix your issue, * was pushed to the Fedora 21 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing mozilla-fira-fonts-3.111-2.fc21' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-4913/mozilla-fira-fonts-3.111-2.fc21 then log in and leave karma (feedback).
mozilla-fira-fonts-3.111-2.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.