[Bug 1278391] [NEW] Very heavy CPU usage for Facebook in Firefox

[halfbeing]

Public bug reported:

When a tab with the Facebook home page is active in Firefox, Firefox's
CPU usage shoots through the roof. It had been very bad for a while, but
recently it has got worse, now sticking at almost a constant 100% on one
core (of a 1.5GHz Core2Duo), as opposed to around 5-20% when the page is
backgrounded or closed.

I cannot reproduce this problem in Opera. I have also read reports on
forums that say this problem does not occur in Chrome.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: firefox 26.0+build2-0ubuntu0.13.10.2
ProcVersionSignature: Ubuntu 3.11.0-15.8-lowlatency 3.11.10
Uname: Linux 3.11.0-15-lowlatency x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
BuildID: 20131206145143
Channel: Unavailable
Date: Mon Feb 10 11:44:41 2014
EcryptfsInUse: Yes
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2013-08-22 (171 days ago)
InstallationMedia: Ubuntu-Studio 13.04 "Raring Ringtail" - Release amd64 (20130424)
IpRoute:
 default via 192.168.1.1 dev eth0  proto static 
 192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.100  metric 1
Locales: extensions.sqlite corrupt or missing
MarkForUpload: True
Profiles: Profile0 (Default) - LastVersion=26.0/20131206145143 (In use)
RelatedPackageVersions:
 gnome-shell        3.8.4-0ubuntu5
 browser-plugin-vlc 2.0.6-2
 totem-mozilla      3.8.2-0ubuntu1
 rhythmbox-mozilla  2.99.1-0ubuntu1
RfKill:
 0: phy0: Wireless LAN
 	Soft blocked: no
 	Hard blocked: no
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to saucy on 2013-10-20 (112 days ago)
WifiSyslog: Feb 10 11:41:32 ermintrude kernel: [370333.201415] usb 2-1.3: USB disconnect, device number 20
dmi.bios.date: 06/28/2007
dmi.bios.vendor: LENOVO
dmi.bios.version: 7OET24WW (1.03 )
dmi.board.name: 8932A11
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:bvr7OET24WW(1.03):bd06/28/2007:svnLENOVO:pn8932A11:pvrThinkPadR61/R61i:rvnLENOVO:rn8932A11:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 8932A11
dmi.product.version: ThinkPad R61/R61i
dmi.sys.vendor: LENOVO

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


** Tags: amd64 apport-bug saucy

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Title:
  Very heavy CPU usage for Facebook in Firefox

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