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[Bug 1521789] Re: firefox freezes with GStreamer-WARNING **: External plugin loader failed.


Going on skomorokh's  advice I downloaded the apparmor tools to put
things into complain mode and so forth.

Theoretically this should not have fixed firefox, but it seems to have
done so for me.  Firefox always used to freeze within minutes for me.
Now it hasn't frozen in days.  I didn't do anything other than install
the apparmor-profiles and apparmor-utils packages and tinker with
complain a little.  I did *not* note what files it complained about nor
did I whitelist any.  Yet it started working, and has done so for the
past few days.

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  firefox freezes with GStreamer-WARNING **: External plugin loader

Status in firefox package in Ubuntu:

Bug description:
  firefox freezes

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: firefox 42.0+build2-0ubuntu0.15.10.1
  ProcVersionSignature: Ubuntu 4.2.0-19.23-generic 4.2.6
  Uname: Linux 4.2.0-19-generic x86_64
  AddonCompatCheckDisabled: False
  ApportVersion: 2.19.1-0ubuntu5
  Architecture: amd64
  BuildID: 20151030083518
  Channel: Unavailable
  CurrentDesktop: Unity
  Date: Tue Dec  1 17:55:35 2015
  ExecutablePath: /usr/lib/firefox/firefox
  Extensions: extensions.sqlite corrupt or missing
  ForcedLayersAccel: False
   # 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)
   default via dev wlan0  proto static  metric 600 dev wlan0  proto kernel  scope link  src  metric 600 dev wlan0  scope link  metric 1000
  Locales: extensions.sqlite corrupt or missing
   iTunes Application Detector - /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so (rhythmbox-mozilla)
   Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
  PrefSources: prefs.js
  ProcAttrCurrent: /usr/lib/firefox/firefox{,*[^s][^h]} (enforce)
  Profiles: Profile0 (Default) - LastVersion=42.0/20151030083518
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  Themes: extensions.sqlite corrupt or missing
  UpgradeStatus: Upgraded to wily on 2015-11-22 (9 days ago)
  dmi.bios.date: 06/23/2014
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1.03.05RS761
  dmi.board.asset.tag: Tag 12345
  dmi.board.name: Gazelle Professional
  dmi.board.vendor: System76, Inc.
  dmi.board.version: gazp9b
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 9
  dmi.chassis.vendor: System76, Inc.
  dmi.chassis.version: gazp9b
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1.03.05RS761:bd06/23/2014:svnSystem76,Inc.:pnGazelleProfessional:pvrgazp9b:rvnSystem76,Inc.:rnGazelleProfessional:rvrgazp9b:cvnSystem76,Inc.:ct9:cvrgazp9b:
  dmi.product.name: Gazelle Professional
  dmi.product.version: gazp9b
  dmi.sys.vendor: System76, Inc.

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