Runtime Error: Server Error in '/' Application

[. . .]

I have not got a clue how to use computers apart from using websites, so all I know is that on 'autism.org.uk' I went back to the Online Community forum page after cancelling a reply, three error panels came up, so I decided, not knowing why, to sign out, and a Runtime Error page remains the case and I can no longer get access to the Online Community forum, whilst all the other options are available.

I went on the internet to find out what a runtime error involved, saw some advice about un-installing and re-installing firefox, which I followed via the Ubuntu Software icon, but it made no difference.

Hence I reported the problem as is here the case.

The system I have is Ubuntu 16.10, with Firefox 54.0 ~ and I cannot for the life of me work out how to install Firefox Quantum as it does not automatically do so. I got the download for FQ, clicked on the box, archive manager comes up ~ and I know not what that involves or how to make use of it.

ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: firefox 54.0+build3-0ubuntu0.16.10.1
ProcVersionSignature: Ubuntu 4.8.0-59.64-generic 4.8.17
Uname: Linux 4.8.0-59-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.3-0ubuntu8.7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: foxyloxy 2038 F.... pulseaudio
BuildID: 20170612122018
Channel: Unavailable
CurrentDesktop: Unity
Date: Mon Dec 18 00:18:07 2017
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2016-11-18 (394 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
IpRoute:
 default via 192.168.0.1 dev enp0s20u5u2 proto static metric 100
 169.254.0.0/16 dev enp0s20u5u2 scope link metric 1000
 192.168.0.0/24 dev enp0s20u5u2 proto kernel scope link src 192.168.0.178 metric 100
IwConfig:
 enp3s0 no wireless extensions.

 lo no wireless extensions.

 enp0s20u5u2 no wireless extensions.
Locales: extensions.sqlite corrupt or missing
PrefSources: prefs.js
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=54.0/20170612122018 (In use)
RfKill:
 0: hci0: Bluetooth
  Soft blocked: yes
  Hard blocked: no
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to yakkety on 2017-04-18 (243 days ago)
dmi.bios.date: 05/19/2016
dmi.bios.vendor: Insyde
dmi.bios.version: F.09
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: 81F1
dmi.board.vendor: HP
dmi.board.version: 64.29
dmi.chassis.asset.tag: Chassis Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsyde:bvrF.09:bd05/19/2016:svnHP:pnHPNotebook:pvrType1ProductConfigId:rvnHP:rn81F1:rvr64.29:cvnHewlett-Packard:ct10:cvrChassisVersion:
dmi.product.name: HP Notebook
dmi.product.version: Type1ProductConfigId
dmi.sys.vendor: HP

[Paul White (paulw2u)]

Thank you for reporting this issue to Ubuntu. The 16.10 release reached "end of life" on 20th July 2017. See this document for the currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

Please upgrade to or install a supported release of Ubuntu and advise if the problem is still reproducible. Firefox 57 (Quantam) is available from the repositories of currently supported releases.

[Launchpad Janitor (janitor)]

[Expired for firefox (Ubuntu) because there has been no activity for 60 days.]