language locales not compatible with firefox 60 update

[Star Man]

On Ubuntu LTS 18.04, after the recent Firefox update to version 60.0+build2, localization is deactivated presenting the browser only in english. In the languages section all language packs are deactivated citing incompatibilities with the present version.

Performing a language support check in Ubuntu Settings do not resolve this issue.

Summary:
Ubuntu LTS 18.04 amd64
firefox 60.0+build2
Browser only shows in english; localization is deactivated due to incomptibilities with the installed language packs.
Browser should be presented in my locale language (spanish).

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: firefox 60.0+build2-0ubuntu1
ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
Uname: Linux 4.15.0-20-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
AddonCompatCheckDisabled: False
ApportVersion: 2.20.9-0ubuntu7
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/pcmC1D0p: julian 1560 F...m pulseaudio
 /dev/snd/controlC1: julian 1560 F.... pulseaudio
 /dev/snd/controlC0: julian 1560 F.... pulseaudio
BuildID: 20180509234620
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
Date: Fri May 11 20:24:31 2018
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 2018-05-08 (3 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
IpRoute:
 default via 192.168.0.1 dev wlp2s0 proto dhcp metric 600
 169.254.0.0/16 dev wlp2s0 scope link metric 1000
 192.168.0.0/24 dev wlp2s0 proto kernel scope link src 192.168.0.37 metric 600
Locales: extensions.sqlite corrupt or missing
PrefSources: prefs.js
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=es_PE.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=60.0/20180509234620 (In use)
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/16/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: GL552VW.218
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: GL552VW
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: ATN12345678901234567
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrGL552VW.218:bd03/16/2016:svnASUSTeKCOMPUTERINC.:pnGL552VW:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnGL552VW:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.family: GL
dmi.product.name: GL552VW
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Mantas Kriaučiūnas (mantas)]

Problem is, that some systems with ubuntu-defaults-it , ubuntu-defaults-zh-cn and ubuntu-defaults-baltix packages installed doesn't have line
intl.locale.requested=""
in /usr/lib/firefox/distribution/distribution.ini

See LP bug #1771272 and bug #1755918 for more info.

[Mantas Kriaučiūnas (mantas)]

line
intl.locale.requested=""
in /usr/lib/firefox/distribution/distribution.ini was added in 59.0+build5 builds, for example:
https://launchpad.net/ubuntu/+source/firefox/59.0+build5-0ubuntu0.16.04.1