[Bug 1711261] [NEW] firefox unacceptably slow

[Humphrey van Polanen Petel]

Public bug reported:

firefox version 55.0.1
slow in loading pages
slow in responding to input
window darkens repeatedly
xorg uses 15% cpu

I will use chromium until this has been fixed

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: firefox 55.0.1+build2-0ubuntu0.16.04.2
ProcVersionSignature: Ubuntu 4.4.0-91.114-generic 4.4.76
Uname: Linux 4.4.0-91-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.1-0ubuntu2.10
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  humphrey   2246 F.... pulseaudio
 /dev/snd/controlC1:  humphrey   2246 F.... pulseaudio
BuildID: 20170814194055
Channel: Unavailable
CurrentDesktop: Unity
Date: Thu Aug 17 10:46:50 2017
ExecutablePath: /usr/lib/firefox/firefox
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 2017-07-27 (20 days ago)
InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
IpRoute:
 default via 192.168.0.1 dev enp4s0  proto static  metric 100 
 169.254.0.0/16 dev enp4s0  scope link  metric 1000 
 192.168.0.0/24 dev enp4s0  proto kernel  scope link  src 192.168.0.101  metric 100
IwConfig:
 lo        no wireless extensions.
 
 enp4s0    no wireless extensions.
Locales: extensions.sqlite corrupt or missing
MostRecentCrashID: bp-75100bdc-c718-4fb8-a6e4-03b672170204
Plugins: Shockwave Flash - /usr/lib/flashplugin-installer/libflashplayer.so
PrefSources: prefs.js
Profiles: Profile0 (Default) - LastVersion=55.0.1/20170814194055 (In use)
RfKill:
 
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/22/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.3.0
dmi.board.name: 0N185P
dmi.board.vendor: Dell Inc.
dmi.board.version: A02
dmi.chassis.type: 3
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.3.0:bd06/22/2010:svnDellInc.:pnVostro420Series:pvr:rvnDellInc.:rn0N185P:rvrA02:cvnDellInc.:ct3:cvr:
dmi.product.name: Vostro 420 Series
dmi.sys.vendor: Dell Inc.

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


** Tags: amd64 apport-bug xenial

-- 
You received this bug notification because you are a member of Mozilla
Bugs, which is subscribed to firefox in Ubuntu.
https://bugs.launchpad.net/bugs/1711261

Title:
  firefox unacceptably slow

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1711261/+subscriptions