Important lag (latency) using firefox9

[ledom]

Firefox8 was fine, no problems.

Since update to firefox9, I have important latency when:
- chosing another tab
- entering text into forms fields (like this one)
- scrolling page (even with smooth scrolling)

I tested with or without extensions, same issue.

The browser is usable but not very comfortable to use because this latency.

Reverting to firefox7 solve the problem.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: firefox 9.0.1+build1-0ubuntu0.11.10.2
ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
Uname: Linux 3.0.0-14-generic i686
AddonCompatCheckDisabled: True
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ledom 1810 F.... pulseaudio
BuildID: 20111228084953
CRDA: Error: [Errno 2] Aucun fichier ou dossier de ce type
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xfe020000 irq 49'
   Mixer name : 'Analog Devices AD1984'
   Components : 'HDA:11d41984,17aa20d7,00100400'
   Controls : 31
   Simple ctrls : 19
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 7KHT22WW-1.06'
   Mixer name : 'ThinkPad EC 7KHT22WW-1.06'
   Components : ''
   Controls : 1
   Simple ctrls : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Channel: release
Date: Thu Jan 12 09:20:38 2012
EcryptfsInUse: Yes
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Firebug - <email address hidden>, Version=1.7.3, minVersion=1.9.2, maxVersion=2.2.0.*, Location=app-profile, Type=extension, Active=Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
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 192.168.1.2 metric 2
ProcEnviron:
 PATH=(custom, no user)
 LANG=fr_FR.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=9.0.1/20111228084953 (Running)
RunningIncompatibleAddons: True
SourcePackage: firefox
UpgradeStatus: Upgraded to oneiric on 2011-11-11 (62 days ago)
UserJS:
 network.protocol-handler.external.picasa - true
 network.protocol-handler.app.picasa - /usr/bin/picasa
WifiSyslog:

dmi.bios.date: 08/22/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7LET51WW (1.21 )
dmi.board.name: 765912G
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7LET51WW(1.21):bd08/22/2007:svnLENOVO:pn765912G:pvrThinkPadT61:rvnLENOVO:rn765912G:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 765912G
dmi.product.version: ThinkPad T61
dmi.sys.vendor: LENOVO

[ledom (sebastien-domeny)]

Full uninstall and reinstall (copying profile files) seems to solve this issue.

[Launchpad Janitor (janitor)]

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

[Paul White (paulw2u)]

Bug report refers to very old versions of Firefox and Ubuntu
In comment #2 reporter says issue resolved
No further comments for almost seven years
Marking "Invalid" to close