[Bug 1231876] [NEW] Since my upgrade to saucy, after switching to firefox the mouse freezes for some seconds

[JR]

Public bug reported:

I typically have a lot of opened tabs in firefox. Since the upgrade to
saucy (kubuntu) I noticed that when switching to the firefox window (via
alt-tab) the mouse cursor freezes for several seconds (I'd say from 3 to
20 - not always the same). Afterwards everything runs fine.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: firefox 24.0+build1-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-8.15-generic 3.11.1
Uname: Linux 3.11.0-8-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.12.4-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  juergen    4658 F.... pulseaudio
 /dev/snd/controlC0:  juergen    4658 F.... pulseaudio
 /dev/snd/pcmC0D0p:   juergen    4658 F...m pulseaudio
BuildID: 20130917154415
Channel: Unavailable
Date: Fri Sep 27 11:03:51 2013
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2010-11-24 (1037 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
IpRoute:
 default via 172.16.96.1 dev eth0  proto static 
 172.16.96.0/20 dev eth0  proto kernel  scope link  src 172.16.101.113  metric 1 
 192.168.122.0/24 dev virbr0  proto kernel  scope link  src 192.168.122.1
IwConfig:
 eth0      no wireless extensions.
 
 lo        no wireless extensions.
 
 virbr0    no wireless extensions.
Locales: extensions.sqlite corrupt or missing
MarkForUpload: True
Profiles: Profile0 (Default) - LastVersion=24.0/20130917154415 (In use)
RelatedPackageVersions:
 icedtea-7-plugin  1.4-3ubuntu2
 google-talkplugin 4.6.3.0-1
 kopete            4:4.11.1-0ubuntu1
 adobe-flashplugin 11.2.202.297-0raring1
RfKill:
 
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to saucy on 2013-08-29 (28 days ago)
WifiSyslog:
 
dmi.bios.date: 09/11/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A04
dmi.board.name: 0D441T
dmi.board.vendor: Dell Inc.
dmi.board.version: A01
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA04:bd09/11/2010:svnDellInc.:pnOptiPlex980:pvr:rvnDellInc.:rn0D441T:rvrA01:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 980
dmi.sys.vendor: Dell Inc.

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


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

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https://bugs.launchpad.net/bugs/1231876

Title:
  Since my upgrade to saucy, after switching to firefox the mouse
  freezes for some seconds

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