CentOS Errata and Security Advisory 2005:768
https://rhn.redhat.com/errata/RHSA-2005-768.html
The following updated files have been uploaded and are currently syncing to the mirrors:
You do it once, you'll be oblicated to support it rest of your life :)
files: updates/ia64/RPMS/firefox-1.0.6-1.4.2.centos3.ia64.rpm
source: updates/ia64/SRPMS/firefox-1.0.6-1.4.2.centos3.src.rpm