[Bug 1721969] [NEW] On tabs (tested with pinned tabs) sound icon is not disappearing when sound is not playing anymore

[Vitali Kuzmin]

Public bug reported:

Once the sound played once in pinned tab and stopped playing sound icon
is still shown on this tab, not disappearing even after a while.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: firefox 56.0+build6-0ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.10.0-36.40~16.04.1-generic 4.10.17
Uname: Linux 4.10.0-36-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
AddonCompatCheckDisabled: False
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/pcmC0D0p:   vtlkzmn   26828 F...m plugin-containe
 /dev/snd/controlC0:  vtlkzmn    8843 F.... pulseaudio
                      vtlkzmn   26828 F.... plugin-containe
 /dev/snd/timer:      vtlkzmn   26828 f.... plugin-containe
BuildID: 20171003101344
Channel: Unavailable
CurrentDesktop: Unity
Date: Sat Oct  7 18:01:51 2017
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 2017-09-27 (9 days ago)
InstallationMedia: Ubuntu 16.04.3 LTS "Xenial Xerus" - Release amd64 (20170801)
IpRoute:
 default via 172.31.224.1 dev wlp2s0  proto static  metric 600 
 169.254.0.0/16 dev wlp2s0  scope link  metric 1000 
 172.31.224.0/21 dev wlp2s0  proto kernel  scope link  src 172.31.230.235  metric 600 
 192.168.56.0/24 dev vboxnet0  proto kernel  scope link  src 192.168.56.1 linkdown
Locales: extensions.sqlite corrupt or missing
Plugins: Shockwave Flash - /usr/lib/adobe-flashplugin/libflashplayer.so (adobe-flashplugin)
PrefSources: prefs.js
Profiles: Profile0 (Default) - LastVersion=56.0/20171003101344 (In use)
RelatedPackageVersions: adobe-flashplugin 1:20170912.1-0ubuntu0.16.04.1
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 03/29/2017
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.2.4
dmi.board.name: 05FFDN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.2.4:bd03/29/2017:svnDellInc.:pnXPS159560:pvr:rvnDellInc.:rn05FFDN:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.name: XPS 15 9560
dmi.sys.vendor: Dell Inc.

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


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

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https://bugs.launchpad.net/bugs/1721969

Title:
  On tabs (tested with pinned tabs) sound icon is not disappearing when
  sound is not playing anymore

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