Firefox sync does not work

[Peppuzzo]

When I go into the Preferences--> Sync tab, both clicking on Pair a Device or Setup Firefox Sync provide no result.

Going from Tools --> Set up Sync gives the following error in the console:

Timestamp: 06/08/2012 11:50:56 PM
Error: resource://services-sync/engines/clients.js - Could not get symbol 'Clients'.
Source File: resource:///modules/services-sync/service.js
Line: 65

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: firefox 13.0+build1-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.2.0-24.39-generic 3.2.16
Uname: Linux 3.2.0-24-generic i686
NonfreeKernelModules: nvidia
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
AplayDevices:
 **** List of PLAYBACK Hardware Devices ****
 card 0: SIS966 [HDA SIS966], device 0: ALC662 rev1 Analog [ALC662 rev1 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
ApportVersion: 2.0.1-0ubuntu8
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: peppuzzo 3323 F.... pulseaudio
BuildID: 20120601173917
Card0.Amixer.info:
 Card hw:0 'SIS966'/'HDA SIS966 at 0xfdff8000 irq 18'
   Mixer name : 'Realtek ALC662 rev1'
   Components : 'HDA:10ec0662,1631e201,00100101'
   Controls : 34
   Simple ctrls : 19
Channel: release
Date: Fri Jun 8 23:45:11 2012
EcryptfsInUse: Yes
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
IpRoute:
 default via 192.168.1.1 dev wlan0 proto static
 169.254.0.0/16 dev wlan0 scope link metric 1000
 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.50 metric 2
MostRecentCrashID: bp-7a81954b-271f-4192-b070-243e22120513
Profiles: Profile0 (Default) - LastVersion=13.0/20120601173917 (In use)
RelatedPackageVersions:
 gnome-shell 3.4.1-0ubuntu2
 rhythmbox-mozilla 2.96-0ubuntu4
 totem-mozilla 3.0.1-0ubuntu21
 sun-java6-bin 6.26-1natty1
 icaclient 11.100
RfKill:
 0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
RunningIncompatibleAddons: False
SourcePackage: firefox
SubmittedCrashIDs:
 bp-7a81954b-271f-4192-b070-243e22120513
 bp-f3d4dab2-c0e3-44a8-aa12-db0bb2110725
 bp-87c39909-aee0-4cf4-9b46-75a332110506
 bp-98068dd9-a05d-4287-9764-39ebf2110506
 bp-d3fc13f4-1618-493c-9d6e-7473f2110506
UpgradeStatus: Upgraded to precise on 2012-05-05 (34 days ago)
dmi.bios.date: 07/17/2007
dmi.bios.vendor: Phoenix Technologies,
dmi.bios.version: Si671V14
dmi.board.name: GA-T671MG
dmi.board.vendor: PACKARD BELL BV
dmi.chassis.type: 3
dmi.chassis.vendor: PACKARD BELL BV
dmi.modalias: dmi:bvnPhoenixTechnologies,:bvrSi671V14:bd07/17/2007:svnPACKARDBELLBV:pnISTARTF9240AIO:pvrPB82119986:rvnPACKARDBELLBV:rnGA-T671MG:rvr:cvnPACKARDBELLBV:ct3:cvr:
dmi.product.name: ISTART F9240 AIO
dmi.product.version: PB82119986
dmi.sys.vendor: PACKARD BELL BV

[Patrick Akridge (everthingappleshow)]

It doesn't affect me..

[Micah Gersten (micahg)]

Thank you for reporting this to Ubuntu. This works for me on 12.04. Do you have the same issue in Safe Mode (firefox -safe-mode)? If it does, one of your extensions might be conflicting with Firefox Sync.

[Chris Coulson (chrisccoulson)]

This is because you have some sync-related files in your profile that are owned by the wrong user. The most likely cause for this is that you have ran Firefox as a different user (with sudo?) at some point.

[Peppuzzo (peppuzzo)]

I have the same issue in safe-mode as well, thanks Micah.

Chris, maybe you are right, but that does not help me much. Where should I look for those files?

[Chris Coulson (chrisccoulson)]

Moving this to the answer tracker, which is a more appropriate place to ask for support

[Peppuzzo (peppuzzo)]

I solved it. It had to do with a corrupted profile indeed.

I have run

firefox -ProfileManager

deleted the old profile, made a new one
and it worked!!!