[Bug 1874656] [NEW] on ubuntu 20.04, firefox does not start well

[gerbier]

Public bug reported:

I have upgraded from ubuntu 19.04 to 20.04 this morning.
and now firefox asks to restart.

I have also tested with a fresh firefox profile, and it is the same
problem.

the console shows the following error message
###!!! [Parent][MessageChannel] Error: (msgtype=0x370034,name=PContent::Msg_UpdateSharedData) Channel error: cannot send/recv

I have stopped apparmor (systemctl stop apparmor) and the problem remain

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: firefox 75.0+build3-0ubuntu1
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: mfe_aac_100608112
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  eric       2799 F.... pulseaudio
 /dev/snd/controlC1:  eric       2799 F.... pulseaudio
BuildID: 20200403170909
CasperMD5CheckResult: skip
Channel: Unavailable
CurrentDesktop: ubuntu:GNOME
CurrentDmesg: Error: command ['dmesg'] failed with exit code 1: dmesg: read kernel buffer failed: Operation not permitted
Date: Fri Apr 24 10:45:06 2020
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 2016-01-11 (1564 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
IpRoute:
 default via 192.168.0.254 dev wlo1 proto dhcp metric 600 
 169.254.0.0/16 dev wlo1 scope link metric 1000 
 192.168.0.0/24 dev wlo1 proto kernel scope link src 192.168.0.11 metric 600
KernLog:
 
Locales: extensions.sqlite corrupt or missing
PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:733
PrefSources: prefs.js
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=75.0/20200403170909 (In use)
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to focal on 2020-04-24 (0 days ago)
dmi.bios.date: 12/22/2011
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68SCF Ver. F.22
dmi.board.name: 1618
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 97.4A
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68SCFVer.F.22:bd12/22/2011:svnHewlett-Packard:pnHPEliteBook8560p:pvrA0001D02:rvnHewlett-Packard:rn1618:rvrKBCVersion97.4A:cvnHewlett-Packard:ct10:cvr:
dmi.product.family: 103C_5336AN
dmi.product.name: HP EliteBook 8560p
dmi.product.sku: WX788AV
dmi.product.version: A0001D02
dmi.sys.vendor: Hewlett-Packard
mtime.conffile..etc.apparmor.d.usr.bin.firefox: 2020-01-11T19:43:12.618232

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal

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Title:
  on ubuntu 20.04, firefox does not start well

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