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** Changed in: firefox (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1199703

Title:
  firefox 22 performs slowly intermittently

Status in firefox package in Ubuntu:
  Incomplete

Bug description:
  I am currently running Ubuntu 13.04 and today I updated to firefox 22.
  Afterwards, the firefox process would jump between ~5% and 99%. Often
  it would gray out and then return. When trying to perform any sort of
  action (select an item from a firefox drop-down menu), try to navigate
  to a web site or search google using the search bar, there would be a
  delay of a few seconds before I would see the menu or see the cursor
  in the location bar or search bar. I verified that
  network.dns.disableIPV6 was set to true and turned off hardware
  acceleration, but the performance problems did not go away. I logged
  out and logged back in but that didn't help either. I eventually
  downgraded to firefox 20 and firefox performed as expected.

  ProblemType: Bug
  DistroRelease: Ubuntu 13.04
  Package: firefox 22.0+build2-0ubuntu0.13.04.2
  ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
  Uname: Linux 3.8.0-26-generic x86_64
  NonfreeKernelModules: wl
  AddonCompatCheckDisabled: False
  ApportVersion: 2.9.2-0ubuntu8.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  ubergic    4262 F.... pulseaudio
  BuildID: 20130627161625
  Channel: Unavailable
  Date: Wed Jul 10 19:29:57 2013
  DefaultProfilePrefSources:
   prefs.js
   
[Profile]/extensions/{2fa4ed95-0317-4c6a-a74c-5f3e3912c1f9}/defaults/preferences/ybookmarks.js
  ForcedLayersAccel: False
  IfupdownConfig:
   auto lo
   iface lo inet loopback
   # iface eth1 inet dhcp
   #    wireless-essid nancyblue
   #    wireless-mode Managed
  InstallationDate: Installed on 2011-07-23 (717 days ago)
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  IpRoute:
   default via 10.1.1.1 dev eth1  proto static 
   10.1.1.0/24 dev eth1  proto kernel  scope link  src 10.1.1.91  metric 9 
   169.254.0.0/16 dev eth1  scope link  metric 1000 
   172.16.162.0/24 dev vmnet1  proto kernel  scope link  src 172.16.162.1 
   192.168.12.0/24 dev vmnet8  proto kernel  scope link  src 192.168.12.1
  MarkForUpload: True
  Profile1PrefSources: prefs.js
  Profiles:
   Profile0 (Default) - LastVersion=20.0/20130417085609 (Out of date)
   Profile1 - LastVersion=20.0/20130329030352 (Out of date)
  RelatedPackageVersions:
   gnome-shell       3.6.3.1-0ubuntu6
   totem-mozilla     3.6.3-0ubuntu6
   rhythmbox-mozilla 2.98-0ubuntu5
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  UpgradeStatus: Upgraded to raring on 2013-04-29 (71 days ago)
  dmi.bios.date: 10/16/2008
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A16
  dmi.board.name: 0U990C
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA16:bd10/16/2008:svnDellInc.:pnInspiron1525:pvr:rvnDellInc.:rn0U990C:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Inspiron 1525
  dmi.sys.vendor: Dell Inc.

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