Updated Thunderbird packages has been released for CentOS 6

CentOS Errata and Security Advisory 2019:3756 Important

Upstream details at : https://access.redhat.com/errata/RHSA-2019:3756

The following updated files have been uploaded and are currently
syncing to the mirrors: ( sha256sum Filename )

i386:
f195208ec80d673585ba407154a45b7b7db4537022ea334e3d03a68272d320f1 thunderbird-68.2.0-2.el6.centos.i686.rpm

x86_64:
f929b73af04bac1471a32ee9e26a06860d6a4d4522fd3b9a511b8a88f3bc2c06 thunderbird-68.2.0-2.el6.centos.x86_64.rpm

Source:
db28a837340f27c5595e37451c71d248d56110177d54fcd80f3aa7f272dc2dd6 thunderbird-68.2.0-2.el6.centos.src.rpm