[Bug 1513641] [NEW] Firefox new tabs not showing up, current tab gets grayed out

[MPinheiro]

Public bug reported:

When I open a new tab (either by CTRL+T or opening a link in a new tab)
the tab does not appear in the tab bar (and the content does not appear
in the current window). The current tab becomes grayed out and cannot be
closed by clicking the x icon, but web navigation is unaffected; I can
go to other pages by clicking links on the current page or typing the
address into the address bar.

New windows open without issue, so I will have to open content in new
windows for now, it seems.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: firefox 42.0+build2-0ubuntu0.15.10.1
ProcVersionSignature: Ubuntu 4.2.0-17.21-generic 4.2.3
Uname: Linux 4.2.0-17-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC1:  mariellep   1718 F.... pulseaudio
 /dev/snd/controlC0:  mariellep   1718 F.... pulseaudio
BuildID: 20151030083518
Channel: Unavailable
CurrentDesktop: GNOME
Date: Thu Nov  5 14:27:20 2015
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 2014-04-30 (554 days ago)
InstallationMedia: Ubuntu-GNOME 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
IpRoute:
 default via 168.150.63.254 dev wlan0  proto static  metric 600 
 168.150.0.0/18 dev wlan0  proto kernel  scope link  src 168.150.43.30  metric 600 
 169.237.160.1 via 168.150.63.254 dev wlan0  proto dhcp  metric 600 
 169.254.0.0/16 dev wlan0  scope link  metric 1000
Locales: extensions.sqlite corrupt or missing
MostRecentCrashID: bp-903c223f-5f88-44f6-b346-a50b32150428
Plugins:
 iTunes Application Detector - /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so (rhythmbox-mozilla)
 Gnome Shell Integration - /usr/lib/mozilla/plugins/libgnome-shell-browser-plugin.so (gnome-shell)
 Silverlight Plug-In - /usr/lib/pipelight/libpipelight-silverlight5.1.so
 Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
 Widevine Media Optimizer - /usr/lib/pipelight/libpipelight-widevine.so
PrefSources: prefs.js
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
Profiles: Profile0 (Default) - LastVersion=42.0/20151030083518 (In use)
RelatedPackageVersions:
 rhythmbox-mozilla 3.2.1-1ubuntu3
 gnome-shell       3.16.4-0ubuntu1
RunningIncompatibleAddons: False
SourcePackage: firefox
SubmittedCrashIDs:
 bp-903c223f-5f88-44f6-b346-a50b32150428
 bp-e6646dc6-555e-45c4-a11b-728b62140917
 bp-bbf9a546-0e42-428c-9cc0-165d42140909
 bp-796833a5-3fe5-4ce2-8cec-21ba32140906
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to wily on 2015-11-01 (4 days ago)
dmi.bios.date: 07/05/2013
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: 1.10
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: MP
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: OEM Chassis Manufacturer
dmi.chassis.version: OEM Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvr1.10:bd07/05/2013:svnTOSHIBA:pnSatelliteL50-A:pvrPSKLJU-01T01V:rvnTOSHIBA:rnPortablePC:rvrMP:cvnOEMChassisManufacturer:ct10:cvrOEMChassisVersion:
dmi.product.name: Satellite L50-A
dmi.product.version: PSKLJU-01T01V
dmi.sys.vendor: TOSHIBA

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


** Tags: amd64 apport-bug wily

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Title:
  Firefox new tabs not showing up, current tab gets grayed out

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