sudo apt-get clean, update, upgrade completed without error. Thank you for
your assistance.
BTW, I checked other error messages, and found that the firefox package
file
/usr/share/doc/firefox-locale-en/copyright was correct. I could discern no
reason for that small error.
On Tue, May 22, 2018 at
Public bug reported:
Could not install '/tmp/apt-dpkg-install-Wboy1K/148-firefox-locale-
en_60.0.1+build2-0ubuntu0.18.04.1_amd64.deb'
The upgrade will continue but the '/tmp/apt-dpkg-install-Wboy1K/148
-firefox-locale-en_60.0.1+build2-0ubuntu0.18.04.1_amd64.deb' package may
not be in a working
