Public bug reported:

Firefox regularly eats up 100% or 200% CPU usage while just gmail and
google calendar pages are opened.

Shutting down firefox does not really shut it down, only the window
disappears, the processes that eat CPU stay, so restarting firefox does
not work until I manually kill these processes.

While they show up as "firefox" in $ top, I now managed to activate the
"thread view" where these processes show up as "mpegaudioparse0" and
"mpegaudioparse1" processes.

Actually this might not be a bug in firefox but in one of the
extensions, e.g., flashplugin, but I am not sure. Firefox should kill
these harshly when exiting, so that restarting firefox is a possible
solution to CPU-eating buggy plugins and extensions.

I am using ubuntu 12.4.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: firefox 28.0+build2-0ubuntu0.12.04.1
ProcVersionSignature: Ubuntu 3.11.0-19.33~precise1-generic 3.11.10.5
Uname: Linux 3.11.0-19-generic x86_64
NonfreeKernelModules: nvidia
AddonCompatCheckDisabled: False
AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k3.11.0-19-generic.
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: PCH [HDA Intel PCH], device 0: 92HD90BXX Analog [92HD90BXX Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  ps         2607 F.... pulseaudio
 /dev/snd/controlC0:  ps         2607 F.... pulseaudio
BuildID: 20140317233623
Card0.Amixer.info:
 Card hw:0 'PCH'/'HDA Intel PCH at 0xe6760000 irq 46'
   Mixer name   : 'IDT 92HD90BXX'
   Components   : 'HDA:111d76e7,10280494,00100102'
   Controls      : 28
   Simple ctrls  : 13
Card1.Amixer.info:
 Card hw:1 'NVidia'/'HDA NVidia at 0xe5080000 irq 17'
   Mixer name   : 'Nvidia GPU 1c HDMI/DP'
   Components   : 'HDA:10de001c,10280494,00100100'
   Controls      : 21
   Simple ctrls  : 3
Channel: Unavailable
Date: Tue Apr  8 14:25:11 2014
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini 
or extensions.sqlite)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
IpRoute:
 default via 193.255.160.1 dev eth0  proto static 
 169.254.0.0/16 dev eth0  scope link  metric 1000 
 193.255.160.0/23 dev eth0  proto kernel  scope link  src 193.255.160.48  
metric 1
Locales: extensions.sqlite corrupt or missing
MarkForUpload: True
MostRecentCrashID: bp-e838124b-7e27-4001-bba3-7c4442140319
PrefSources:
 prefs.js
 
[Profile]/extensions/{3d7eb24f-2740-49df-8937-200b1cc08f8a}/defaults/preferences/flashblock.js
Profiles: Profile0 (Default) - LastVersion=28.0/20140317233623 (In use)
RelatedPackageVersions:
 google-talkplugin 5.2.4.0-1
 icedtea-7-plugin  1.2.3-0ubuntu0.12.04.4
 rhythmbox-mozilla 2.96-0ubuntu4.3
 totem-mozilla     3.0.1-0ubuntu21.1
 gnome-shell       3.4.1-0ubuntu2
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 10/18/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A08
dmi.board.name: 0692FT
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA08:bd10/18/2011:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0692FT:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E6520
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.

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


** Tags: amd64 apport-bug precise third-party-packages

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You received this bug notification because you are a member of Desktop
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https://bugs.launchpad.net/bugs/1304351

Title:
  firefox 200% CPU usage while idle/shutdown: mpegaudioparse0 and
  mpegaudioparse1 processes

Status in “firefox” package in Ubuntu:
  New

Bug description:
  Firefox regularly eats up 100% or 200% CPU usage while just gmail and
  google calendar pages are opened.

  Shutting down firefox does not really shut it down, only the window
  disappears, the processes that eat CPU stay, so restarting firefox
  does not work until I manually kill these processes.

  While they show up as "firefox" in $ top, I now managed to activate
  the "thread view" where these processes show up as "mpegaudioparse0"
  and "mpegaudioparse1" processes.

  Actually this might not be a bug in firefox but in one of the
  extensions, e.g., flashplugin, but I am not sure. Firefox should kill
  these harshly when exiting, so that restarting firefox is a possible
  solution to CPU-eating buggy plugins and extensions.

  I am using ubuntu 12.4.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: firefox 28.0+build2-0ubuntu0.12.04.1
  ProcVersionSignature: Ubuntu 3.11.0-19.33~precise1-generic 3.11.10.5
  Uname: Linux 3.11.0-19-generic x86_64
  NonfreeKernelModules: nvidia
  AddonCompatCheckDisabled: False
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 
k3.11.0-19-generic.
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: PCH [HDA Intel PCH], device 0: 92HD90BXX Analog [92HD90BXX Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  ps         2607 F.... pulseaudio
   /dev/snd/controlC0:  ps         2607 F.... pulseaudio
  BuildID: 20140317233623
  Card0.Amixer.info:
   Card hw:0 'PCH'/'HDA Intel PCH at 0xe6760000 irq 46'
     Mixer name : 'IDT 92HD90BXX'
     Components : 'HDA:111d76e7,10280494,00100102'
     Controls      : 28
     Simple ctrls  : 13
  Card1.Amixer.info:
   Card hw:1 'NVidia'/'HDA NVidia at 0xe5080000 irq 17'
     Mixer name : 'Nvidia GPU 1c HDMI/DP'
     Components : 'HDA:10de001c,10280494,00100100'
     Controls      : 21
     Simple ctrls  : 3
  Channel: Unavailable
  Date: Tue Apr  8 14:25:11 2014
  Extensions: extensions.sqlite corrupt or missing
  ForcedLayersAccel: False
  IncompatibleExtensions: Unavailable (corrupt or non-existant 
compatibility.ini or extensions.sqlite)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
  IpRoute:
   default via 193.255.160.1 dev eth0  proto static 
   169.254.0.0/16 dev eth0  scope link  metric 1000 
   193.255.160.0/23 dev eth0  proto kernel  scope link  src 193.255.160.48  
metric 1
  Locales: extensions.sqlite corrupt or missing
  MarkForUpload: True
  MostRecentCrashID: bp-e838124b-7e27-4001-bba3-7c4442140319
  PrefSources:
   prefs.js
   
[Profile]/extensions/{3d7eb24f-2740-49df-8937-200b1cc08f8a}/defaults/preferences/flashblock.js
  Profiles: Profile0 (Default) - LastVersion=28.0/20140317233623 (In use)
  RelatedPackageVersions:
   google-talkplugin 5.2.4.0-1
   icedtea-7-plugin  1.2.3-0ubuntu0.12.04.4
   rhythmbox-mozilla 2.96-0ubuntu4.3
   totem-mozilla     3.0.1-0ubuntu21.1
   gnome-shell       3.4.1-0ubuntu2
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  Themes: extensions.sqlite corrupt or missing
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/18/2011
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A08
  dmi.board.name: 0692FT
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 9
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: 
dmi:bvnDellInc.:bvrA08:bd10/18/2011:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0692FT:rvrA00:cvnDellInc.:ct9:cvr:
  dmi.product.name: Latitude E6520
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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