Faulty Software Updater on 16.04

[Ralf Mardorf]

On Sat, 7 Oct 2017 03:32:12 +0800, Bret Busby wrote:
>The updates include Firefox, which I do not trust in versions later
>than the installed version on this machine; 53.0.3 .

Actually dpkg as well as
http://manpages.ubuntu.com/manpages/xenial/man8/apt-mark.8.html allow
to "hold" packages and to upgrade anything else, assuming there
should be no dependency conflicts, but I'm not willing to help you
holding a browser, that needs a security upgrade,
https://usn.ubuntu.com/usn/usn-3391-1/ . Synaptic allows this, too, but
is using another term, not "hold".