[Bug 1562436] [NEW] Firefox hangs system on certain urls

[Tom]

Public bug reported:

When you go to many urls with lots of images and videos (such as
http://news.google.com/news/url?sr=1&ct2=us%2F1_0_s_1_1_a&sa=t&usg=AFQjCNF3YmGSJKFgDC92d6FUG8AmbybUzg&cid=52779069898901&url=http%3A%2F%2Fwww.mirror.co.uk%2Fnews
%2Fworld-news%2Fbarack-obama-filmed-hiding-wedding-7633906&ei=hDz3Vsi-
DZKLhAG107fYDw&rt=HOMEPAGE&vm=STANDARD&bvm=section&did=5638657433709108861&sid
=en_us-sfy&ssid=sfy&st=1&at=dt0&eid=%2Fm%2F02mjmr&ise=false&insrc=8) the
page seems to load ok, but then Firefox greys out and then right after
that the mouse pointer stops moving. One must do a hard power off, power
on to get the machine to work again. Just recently started happening as
of version 45 update of firefox. Tried restarting in safe mode and it
still does it. Quite frustrating. Seems every page from news.google.com
will cause the issue although you can load news.google.com ok.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: firefox 45.0+build2-0ubuntu0.14.04.1
ProcVersionSignature: Ubuntu 3.19.0-56.62~14.04.1-generic 3.19.8-ckt15
Uname: Linux 3.19.0-56-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.14.1-0ubuntu3.19
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  tom        2209 F.... pulseaudio
 /dev/snd/controlC1:  tom        2209 F.... pulseaudio
BuildID: 20160304114926
Channel: Unavailable
CurrentDesktop: Unity
Date: Sat Mar 26 18:50:32 2016
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 2015-10-15 (163 days ago)
InstallationMedia: Ubuntu 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
IpRoute:
 default via 192.168.1.1 dev wlan0  proto static 
 192.168.1.0/24 dev wlan0  proto kernel  scope link  src 192.168.1.105  metric 9
Locales: extensions.sqlite corrupt or missing
PrefSources: prefs.js
ProcEnviron:
 LANGUAGE=en_US
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=45.0/20160304114926 (In use)
RelatedPackageVersions:
 totem-mozilla     3.10.1-1ubuntu4
 rhythmbox-mozilla 3.0.2-0ubuntu2
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/01/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N56JN.202
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N56JN
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN56JN.202:bd04/01/2014:svnASUSTeKCOMPUTERINC.:pnN56JN:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN56JN:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: N56JN
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.

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


** Tags: amd64 apport-bug trusty

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Title:
  Firefox hangs system on certain urls

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