Public bug reported:

When a html5 video is played in fullscreen mode, and I change volume,
the unity volume indicator indicates change in volume, but the full
screen mode is escaped in the browser.

Example of html5 video to reproduce problem:
<video width="320" height="240" controls>
  <source src="movie.mp4" type="video/mp4">
  <source src="movie.ogg" type="video/ogg">
  Your browser does not support the video tag.
</video>
This is accessible on 
http://www.w3schools.com/html/tryit.asp?filename=tryhtml5_video_all, and make 
fullscreen by right clicking on the video. Now change volume using volume key 
on your multimedia keyboard.
The fullscreen is escaped.

This is also true when a youtube.com/html5 is enabled for html5. Then
when playing most videos in full screen, if I change volume, the full
screen mode escapes. This is extremely irritating as a video in a non-
fullscreen mode plays at 360p quality, and when in full screen by
default it does at 480p. Now, if I change volume by using its key on
keyboard, it will shift to a non-fullscreen mode and change quality and
start rebuffering.

Please fix this.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: firefox 20.0+build1-0ubuntu0.12.10.3
ProcVersionSignature: Ubuntu 3.5.0-26.42-generic 3.5.7.6
Uname: Linux 3.5.0-26-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.6.1-0ubuntu10
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  bha1       2340 F.... pulseaudio
BuildID: 20130329030352
Channel: Unavailable
Date: Sun Apr  7 10:22:27 2013
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2012-10-18 (170 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
IpRoute:
 default via 10.4.1.1 dev eth0  proto static 
 10.0.0.0/8 dev eth0  proto kernel  scope link  src 10.4.1.121  metric 1 
 169.254.0.0/16 dev eth0  scope link  metric 1000
MarkForUpload: True
Plugins:
 Google Talk Plugin Video Accelerator - 
/opt/google/talkplugin/libnpgtpo3dautoplugin.so (google-talkplugin)
 Google Talk Plugin - /opt/google/talkplugin/libnpgoogletalk.so 
(google-talkplugin)
 Google Talk Plugin Video Renderer - /opt/google/talkplugin/libnpo1d.so 
(google-talkplugin)
 Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
 IcedTea-Web Plugin (using IcedTea-Web 1.3 (1.3-1ubuntu1.1)) - 
/usr/lib/jvm/java-7-openjdk-amd64/jre/lib/amd64/IcedTeaPlugin.so 
(icedtea-7-plugin)
PrefSources:
 prefs.js
 
[Profile]/extensions/{bb6bc1bb-f824-4702-90cd-35e2fb24f25d}/defaults/preferences/cookiemanagerplus-preferences.js
Profiles: Profile0 (Default) - LastVersion=20.0/20130329030352 (In use)
RelatedPackageVersions:
 google-talkplugin 3.17.0.0-1
 icedtea-7-plugin  1.3-1ubuntu1.1
RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/24/2010
dmi.bios.vendor: Phoenix Technologies LTD
dmi.bios.version: V1.34
dmi.board.name: JV50_MV
dmi.board.vendor: Acer
dmi.board.version: Rev
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: N/A
dmi.modalias: 
dmi:bvnPhoenixTechnologiesLTD:bvrV1.34:bd09/24/2010:svnAcer:pnAspire5738:pvr0100:rvnAcer:rnJV50_MV:rvrRev:cvnAcer:ct10:cvrN/A:
dmi.product.name: Aspire 5738
dmi.product.version: 0100
dmi.sys.vendor: Acer
http_proxy: http://127.0.0.1:8080/
no_proxy: localhost,127.0.0.0/8

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


** Tags: amd64 apport-bug quantal running-unity

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https://bugs.launchpad.net/bugs/1165649

Title:
  html5 video exits fullscreen mode when volume key is pressed

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