Public bug reported:

All full screen videos are heavily stuttering in Firefox.
The stuttering is very heavy, it basically stops for a few seconds then jumps 
to a next frame, again stops for a few seconds then again jumps to a next frame.
There is absolutely no  continuous play, it just jumps from one frame to the 
other.

Videos in Chromium work fine.

Restarting Firefox does not help.
Restarting gnome-shell does not help.

When I restart the whole computer it is okay for a short time, but it
gets into this state very quickly.

Although this happens in Firefox I'm not sure if this is a Firefox bug
or a bug in some underlying infrastructure like xorg or video driver.

I would be happy to debug this if someone could tell me in where I
should start.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: firefox 47.0+build3-0ubuntu0.16.04.1
ProcVersionSignature: Error: [Errno 2] No such file or directory: 
'/proc/version_signature'
Uname: Linux 4.6.2-040602-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  viktor     2428 F.... pulseaudio
 /dev/snd/pcmC1D0p:   viktor     2428 F...m pulseaudio
 /dev/snd/controlC1:  viktor     2428 F.... pulseaudio
BuildID: 20160606113944
Channel: Unavailable
CurrentDesktop: GNOME
Date: Sun Jul 10 12:08:04 2016
DefaultProfileIncompatibleExtensions:
 English (South Africa) Language Pack - langpack-en...@firefox.mozilla.org
 English (GB) Language Pack - langpack-en...@firefox.mozilla.org
 Default - {972ce4c6-7e08-4474-a285-3208198ce6fd}
DefaultProfilePlugins:
 Gnome Shell Integration - 
/usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
 Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
DefaultProfilePrefSources:
 prefs.js
 
[Profile]/extensions/{3d7eb24f-2740-49df-8937-200b1cc08f8a}/defaults/preferences/flashblock.js
 [Profile]/extensions/foxma...@kei.com/defaults/preferences/prefs.js
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IpRoute:
 default via 10.10.10.1 dev wlp2s0  proto static  metric 600 
 10.10.10.0/24 dev wlp2s0  proto kernel  scope link  src 10.10.10.251  metric 
600 
 169.254.0.0/16 dev docker0  scope link  metric 1000 
 172.17.0.0/16 dev docker0  proto kernel  scope link  src 172.17.0.1
MostRecentCrashID: bp-581b158a-e18d-4af8-8bea-d226e2160318
Profile1IncompatibleExtensions:
 English (South Africa) Language Pack - langpack-en...@firefox.mozilla.org
 English (GB) Language Pack - langpack-en...@firefox.mozilla.org
 Default - {972ce4c6-7e08-4474-a285-3208198ce6fd}
Profile1Plugins:
 Gnome Shell Integration - 
/usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
 iTunes Application Detector - 
/usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so
 IcedTea-Web Plugin (using IcedTea-Web 1.5.3 (1.5.3-0ubuntu0.15.10.1)) - 
/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so
 Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
Profile1PrefSources:
 prefs.js
 
[Profile]/extensions/{3d7eb24f-2740-49df-8937-200b1cc08f8a}/defaults/preferences/flashblock.js
Profile2IncompatibleExtensions:
 English (South Africa) Language Pack - langpack-en...@firefox.mozilla.org
 English (GB) Language Pack - langpack-en...@firefox.mozilla.org
 Default - {972ce4c6-7e08-4474-a285-3208198ce6fd}
Profile2Plugins:
 Gnome Shell Integration - 
/usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
 Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
Profile2PrefSources:
 prefs.js
 
[Profile]/extensions/{3d7eb24f-2740-49df-8937-200b1cc08f8a}/defaults/preferences/flashblock.js
 [Profile]/extensions/foxma...@kei.com/defaults/preferences/prefs.js
Profile3Extensions: extensions.sqlite corrupt or missing
Profile3IncompatibleExtensions: Unavailable (corrupt or non-existant 
compatibility.ini or extensions.sqlite)
Profile3Locales: extensions.sqlite corrupt or missing
Profile3Plugins:
 Gnome Shell Integration - 
/usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
 Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
Profile3PrefSources: prefs.js
Profile3Themes: extensions.sqlite corrupt or missing
Profile4Extensions: extensions.sqlite corrupt or missing
Profile4IncompatibleExtensions: Unavailable (corrupt or non-existant 
compatibility.ini or extensions.sqlite)
Profile4Locales: extensions.sqlite corrupt or missing
Profile4PrefSources: prefs.js
Profile4Themes: extensions.sqlite corrupt or missing
Profile5Extensions: extensions.sqlite corrupt or missing
Profile5IncompatibleExtensions: Unavailable (corrupt or non-existant 
compatibility.ini or extensions.sqlite)
Profile5Locales: extensions.sqlite corrupt or missing
Profile5Plugins:
 Gnome Shell Integration - 
/usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
 Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
Profile5PrefSources: prefs.js
Profile5Themes: extensions.sqlite corrupt or missing
RunningIncompatibleAddons: True
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/18/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A11
dmi.board.name: 0JPRM5
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias: 
dmi:bvnDellInc.:bvrA11:bd11/18/2015:svnDellInc.:pnLatitudeE5550:pvr:rvnDellInc.:rn0JPRM5:rvrA00:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E5550
dmi.sys.vendor: Dell Inc.

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


** Tags: amd64 apport-bug xenial

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https://bugs.launchpad.net/bugs/1600577

Title:
  Fullscreen videos stuttering in Firefox

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