[Bug 1295858] [NEW] Fx running amok (> 90%) on https://www.facebook.com

[LAZA]

Public bug reported:

steps to reproduce:
- install Ubuntu Trusty (14.04) in VirtualBox
- - 2 GB RAM
- - 2,6 GHz CPU
- - 64 MB Graphics

- start VM, login, do all updates
- open Terminal, start htop
- open up Firefox
- start texting on Launchpad
--> CPU idles (2-6%), load average ~0,2, 12,5% RAM per task (2 tasks running)

- go to https://www.facebook.com, login
-->  CPU up to 90% most of the time, load average 0,8-0.8, 14% RAM per task (about 20 tasks running!)

Complete load of the machine is permanent over 90%, memory 560 MB of
2048 MB, Swap 0 MB.

Flash Plugin is loaded 2 times, but 0 CPU time 0.9 memory.

.

Xubuntu 14.04
Firefox 28

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: firefox 28.0+build2-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-18.38-generic 3.13.6
Uname: Linux 3.13.0-18-generic i686
AddonCompatCheckDisabled: False
ApportVersion: 2.13.3-0ubuntu1
Architecture: i386
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  frank      1668 F.... pulseaudio
BuildID: 20140317145440
Channel: Unavailable
CurrentDesktop: XFCE
Date: Fri Mar 21 22:38:23 2014
ExecutablePath: /usr/lib/firefox/firefox
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 2014-03-18 (3 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Alpha i386 (20140225)
IpRoute:
 default via 10.0.2.2 dev eth0  proto static 
 10.0.2.0/24 dev eth0  proto kernel  scope link  src 10.0.2.15  metric 1
IwConfig:
 lo        no wireless extensions.
 
 eth0      no wireless extensions.
Locales: extensions.sqlite corrupt or missing
Plugins: Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
PrefSources: prefs.js
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=28.0/20140317145440 (In use)
RfKill:
 
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 12/01/2006
dmi.bios.vendor: innotek GmbH
dmi.bios.version: VirtualBox
dmi.board.name: VirtualBox
dmi.board.vendor: Oracle Corporation
dmi.board.version: 1.2
dmi.chassis.type: 1
dmi.chassis.vendor: Oracle Corporation
dmi.modalias: dmi:bvninnotekGmbH:bvrVirtualBox:bd12/01/2006:svninnotekGmbH:pnVirtualBox:pvr1.2:rvnOracleCorporation:rnVirtualBox:rvr1.2:cvnOracleCorporation:ct1:cvr:
dmi.product.name: VirtualBox
dmi.product.version: 1.2
dmi.sys.vendor: innotek GmbH

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


** Tags: apport-bug i386 trusty

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https://bugs.launchpad.net/bugs/1295858

Title:
  Fx running amok (> 90%) on https://www.facebook.com

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