[systemd] [vivid] Fails to start

[dino99]

Experience that firefox 36 start failing on vivid i386 booted with systemd-syv on a gnome-shell session.

from a terminal, i get:
oem@u32:~$ firefox

(process:7753): GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed

as per https://bugzilla.mozilla.org/show_bug.cgi?id=833117#c43 : g_slice_set_config is deprecated and should be replaced by G_SLICE env var

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: firefox 36.0+build2-0ubuntu4
ProcVersionSignature: Ubuntu 3.19.0-7.7-generic 3.19.0
Uname: Linux 3.19.0-7-generic i686
NonfreeKernelModules: nvidia
AddonCompatCheckDisabled: False
ApportVersion: 2.16.1-0ubuntu2
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: oem 1721 F.... pulseaudio
 /dev/snd/pcmC0D0p: oem 1721 F...m pulseaudio
 /dev/snd/controlC0: oem 1721 F.... pulseaudio
BootDmesg: (Nothing has been logged yet.)
BuildID: 20150224111745
Channel: Unavailable
CurrentDesktop: GNOME
Date: Sat Feb 28 14:56:52 2015
ForcedLayersAccel: False
IncompatibleExtensions:
 English (South Africa) Language Pack - <email address hidden>
 Français Language Pack - <email address hidden>
 English (GB) Language Pack - <email address hidden>
 Default - {972ce4c6-7e08-4474-a285-3208198ce6fd}
IpRoute:
 default via 192.168.1.1 dev eth1 proto static metric 1024
 169.254.0.0/16 dev eth1 scope link metric 1000
 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.3
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.

 eth1 no wireless extensions.
PrefSources:
 prefs.js
 [Profile]/extensions/{dd3d7613-0246-469d-bc65-2a3cc1668adc}/defaults/preferences/prefs.js
 [Profile]/extensions/{8A6C82A1-F6C9-481a-AAE7-C96444C9A754}/defaults/preferences/prefs.js
Profiles: Profile0 (Default) - LastVersion=36.0/20150122160722 (Out of date)
RfKill:

RunningIncompatibleAddons: True
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/22/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 3002
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5W DH Deluxe
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr3002:bd07/22/2010:svnASUSTEKCOMPUTERINC:pnP5WDHDeluxe:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5WDHDeluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: P5W DH Deluxe
dmi.product.version: System Version
dmi.sys.vendor: ASUSTEK COMPUTER INC

[dino99 (9d9)]

After a fresh vivid installation, that issue is gone