http://rhn.redhat.com/errata/RHSA-2005-336.html refers.

The following updated files have been uploaded and are currently syncing to the mirrors:

i386:
firefox-1.0.2-1.4.1.centos4.i386.rpm 24-Mar-2005 04:14 16M

x86_64:
firefox-1.0.2-1.4.1.centos4.x86_64.rpm 24-Mar-2005 03:33 17M