Mozilla Firefox and others: Update to 20.0/17.0.5 releases (important)

The Mozilla suite received security and bugfix updates: Firefox was updated to version 20.0. Thunderbird was updated to version 17.0.5. Seamonkey was updated to version 2.17 mozilla-nss was updated to version 3.14.3. mozilla-nspr was updated to version 4.9.6. mozilla-nspr was updated to version...