The following updates are available for CentOS 4: CESA-2011:0471 Critical CentOS 4 x86_64 firefox Update, CESA-2011:0471 Critical CentOS 4 i386 firefox Update, CESA-2011:0473 Critical CentOS 4 x86_64 seamonkey Update, CESA-2011:0473 Critical CentOS 4 i386 seamonkey Update, CESA-2011:0472 Important CentOS 4 x86_64 nss Update, CESA-2011:0472 Important CentOS 4 i386 nss Update, CESA-2011:0474 Critical CentOS 4 i386 thunderbird Update, and CESA-2011:0474 Critical CentOS 4 x86_64 thunderbird Update Read more