Comment 2 for bug 1732946

Happens on ubuntumate 17.10 and ubuntustudio 17.10 the same way.

Why did this update without questioning the user? Do firefox itself trigger the unattended update?

From history.log

Start-Date: 2017-11-17 15:17:48
Commandline: /usr/bin/unattended-upgrade
Upgrade: firefox:amd64 (56.0+build6-0ubuntu1, 57.0+build4-0ubuntu0.17.10.5)
End-Date: 2017-11-17 15:17:56

Start-Date: 2017-11-17 15:18:04
Commandline: /usr/bin/unattended-upgrade
Upgrade: firefox-locale-de:amd64 (56.0+build6-0ubuntu1, 57.0+build4-0ubuntu0.17.
10.5)
End-Date: 2017-11-17 15:18:05

So remove the wrong version and install the older one, with setting HOLD

Start-Date: 2017-11-17 15:24:32
Commandline: /usr/sbin/synaptic
Requested-By: eric (1000)
Remove: firefox-locale-de:amd64 (57.0+build4-0ubuntu0.17.10.5), firefox-locale-e
n:amd64 (57.0+build4-0ubuntu0.17.10.5), firefox:amd64 (57.0+build4-0ubuntu0.17.1
0.5), gimp-help-de:amd64 (2.8.2-0.1), gimp-help-en:amd64 (2.8.2-0.1)
End-Date: 2017-11-17 15:24:34

Start-Date: 2017-11-17 15:26:16
Commandline: packagekit role='install-files'
Requested-By: eric (1000)
Install: firefox:amd64 (56.0+build6-0ubuntu1)
End-Date: 2017-11-17 15:26:24

Start-Date: 2017-11-17 15:26:48
Commandline: packagekit role='install-files'
Requested-By: eric (1000)
Install: firefox-locale-de:amd64 (56.0+build6-0ubuntu1)
End-Date: 2017-11-17 15:26:49

Whoops, unattended upgrade while packages on hold after boot

Start-Date: 2017-11-18 11:07:07
Commandline: /usr/bin/unattended-upgrade
Upgrade: firefox:amd64 (56.0+build6-0ubuntu1, 57.0+build4-0ubuntu0.17.10.5)
End-Date: 2017-11-18 11:07:16

Start-Date: 2017-11-18 11:07:20
Commandline: /usr/bin/unattended-upgrade
Upgrade: firefox-locale-de:amd64 (56.0+build6-0ubuntu1, 57.0+build4-0ubuntu0.17.
10.5), firefox:amd64 (56.0+build6-0ubuntu1, 57.0+build4-0ubuntu0.17.10.5)
End-Date: 2017-11-18 11:07:29

So downgrading the pieces again by hand and set hold again

Start-Date: 2017-11-18 11:50:44
Commandline: /usr/sbin/synaptic
Requested-By: eric (1000)
Downgrade: firefox-locale-de:amd64 (57.0+build4-0ubuntu0.17.10.5, 56.0+build6-0u
buntu1)
End-Date: 2017-11-18 11:50:45

Start-Date: 2017-11-18 11:53:04
Commandline: /usr/sbin/synaptic
Requested-By: eric (1000)
Downgrade: firefox:amd64 (57.0+build4-0ubuntu0.17.10.5, 56.0+build6-0ubuntu1)
End-Date: 2017-11-18 11:53:12