Faulty Software Updater on 16.04

[Ralf Mardorf]

On Sat, 7 Oct 2017 23:19:09 +0200, Ralf Mardorf wrote:
>On Sat, 7 Oct 2017 23:14:47 +0200, Ralf Mardorf wrote:
>>Open a terminal and run
>>
>>  firefox --safe-mode
>>
>>Does the issue still appear?
>>
>>If so run
>>
>>  pkill -9 firefox
>>
>>then
>>
>>  firefox --ProfileManager
>>
>>Create a new profile and run Firefox with the new profile.
>>
>>Report back what happens.  
>
>Also try creating a second new profile and then run this profile by
>
>  firefox --no-remote
>
>then create a third new profile and run
>
>  firefox --private-window
>
>What happens?

If the issue should still appear by all those tests, create a new
user, log out and run a session as the new user or run a session as
guest user.

Run

  apt-cache show firefox

and

  apt-cache policy firefox

and post the outputs.

Unfortunately I only have qupzilla from official repositories and
icecat by no package at all installed, however on Arch Linux I've got
Firefox installed and never experienced this issue.

[rocketmouse at archlinux ~]$ grep upgraded\ firefox /var/log/pacman.log |
tail -25
[2016-08-25 06:34] [ALPM] upgraded firefox (48.0.1-1 -> 48.0.2-1)
[2016-09-22 06:54] [ALPM] upgraded firefox (48.0.2-1 -> 49.0-1)
[2016-09-24 10:40] [ALPM] upgraded firefox (49.0-1 -> 49.0.1-1)
[2016-10-23 19:56] [ALPM] upgraded firefox (49.0.1-1 -> 49.0.2-1)
[2016-11-16 10:00] [ALPM] upgraded firefox (49.0.2-1 -> 50.0-1)
[2016-12-01 21:39] [ALPM] upgraded firefox (50.0-1 -> 50.0.2-1)
[2016-12-14 07:47] [ALPM] upgraded firefox (50.0.2-1 -> 50.1.0-1)
[2017-01-28 22:20] [ALPM] upgraded firefox (50.1.0-1 -> 51.0.1-1)
[2017-03-07 10:59] [ALPM] upgraded firefox (51.0.1-1 -> 52.0-1)
[2017-03-07 22:55] [ALPM] upgraded firefox (52.0-1 -> 52.0-2)
[2017-03-18 09:38] [ALPM] upgraded firefox (52.0-2 -> 52.0.1-1)
[2017-03-23 08:59] [ALPM] upgraded firefox (52.0.1-1 -> 52.0.1-2)
[2017-03-31 14:01] [ALPM] upgraded firefox (52.0.1-2 -> 52.0.2-1)
[2017-04-21 18:54] [ALPM] upgraded firefox (52.0.2-1 -> 53.0-1)
[2017-04-30 04:04] [ALPM] upgraded firefox (53.0-1 -> 53.0-2)
[2017-05-07 11:39] [ALPM] upgraded firefox (53.0-2 -> 53.0.2-1)
[2017-05-21 10:48] [ALPM] upgraded firefox (53.0.2-1 -> 53.0.3-1)
[2017-06-16 06:03] [ALPM] upgraded firefox (53.0.3-1 -> 54.0-1)
[2017-07-01 10:44] [ALPM] upgraded firefox (54.0-1 -> 54.0.1-1)
[2017-08-08 18:35] [ALPM] upgraded firefox (54.0.1-1 -> 55.0-1)
[2017-08-11 22:53] [ALPM] upgraded firefox (55.0-1 -> 55.0.1-1)
[2017-08-17 06:19] [ALPM] upgraded firefox (55.0.1-1 -> 55.0.2-1)
[2017-08-28 11:12] [ALPM] upgraded firefox (55.0.2-1 -> 55.0.3-1)
[2017-09-23 06:26] [ALPM] upgraded firefox (55.0.3-1 -> 55.0.3-3)
[2017-10-07 07:37] [ALPM] upgraded firefox (55.0.3-3 -> 56.0-1)

You did purge firefox, cleared the package cache and installed it again?
        ^^^^^          ^^^^^^^didn't install it from the package cache
        ^^^^^not just removed or reinstalled it

Run

  pkill -9 firefox
  mv -i ~/.mozilla/ .mozilla_quarantine
  rm -rf mozilla* ~/.cache/mozilla/
  firefox

FWIW ~/.cache/mozilla/ is not the package cache, the package cache
is /var/cache/apt/archives/ .