Ubuntu 14.04 just updated Firefox to 30.0 and for the first time I'm seeing this problem. `top -H` shows two mpegaudioparse0/1 threads at 98.6 and 96.6 %CPU.
I have totem and totem-mozilla packages installed. Confusingly, Totem doesn't appear in about:addons > Plugins, but if I click the _More_ link for DivX® Web Player, QuickTime Plug-in 7.6.6, VLC Multimedia Plugin (compatible Videos 3.10.1), or Windows Media Player Plug-in 10 (compatible; Videos), each is being supplied by File libtotem-<someLibraryName>.so. It's a lot clearer if you visit about:plugins instead. Mozilla's plugin-check service identifies the one plugin masquerading as all these as "Totem - The Videos 3.10.1 plugin handles video and audio streams." and says it's up-to-date. I ran `sudo apt-get remove totem-mozilla`, killed the two threads, and restarted Firefox and that fixed it. So I think somehow Firefox 30's new support for GStreamer should come with a "Suggest removing totem- mozilla". I don't recall ever explicitly installing totem-mozilla,maybe it was recommended for Firefox years ago. Presumably the totem-mozilla plugin spoofs the DivX/QuickTime/VLC/Windows Media Player plugins so that Web pages that check for them work with Firefox. I don't know how many web pages are out there depending on this. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to totem in Ubuntu. https://bugs.launchpad.net/bugs/1304351 Title: firefox 200% CPU usage while idle/shutdown: mpegaudioparse0 and mpegaudioparse1 processes Status in “totem” package in Ubuntu: Confirmed Bug description: Firefox regularly eats up 100% or 200% CPU usage while just gmail and google calendar pages are opened. Shutting down firefox does not really shut it down, only the window disappears, the processes that eat CPU stay, so restarting firefox does not work until I manually kill these processes. While they show up as "firefox" in $ top, I now managed to activate the "thread view" where these processes show up as "mpegaudioparse0" and "mpegaudioparse1" processes. Actually this might not be a bug in firefox but in one of the extensions, e.g., flashplugin, but I am not sure. Firefox should kill these harshly when exiting, so that restarting firefox is a possible solution to CPU-eating buggy plugins and extensions. I am using ubuntu 12.4. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: firefox 28.0+build2-0ubuntu0.12.04.1 ProcVersionSignature: Ubuntu 3.11.0-19.33~precise1-generic 3.11.10.5 Uname: Linux 3.11.0-19-generic x86_64 NonfreeKernelModules: nvidia AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.11.0-19-generic. ApportVersion: 2.0.1-0ubuntu17.6 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: 92HD90BXX Analog [92HD90BXX Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: ps 2607 F.... pulseaudio /dev/snd/controlC0: ps 2607 F.... pulseaudio BuildID: 20140317233623 Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xe6760000 irq 46' Mixer name : 'IDT 92HD90BXX' Components : 'HDA:111d76e7,10280494,00100102' Controls : 28 Simple ctrls : 13 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xe5080000 irq 17' Mixer name : 'Nvidia GPU 1c HDMI/DP' Components : 'HDA:10de001c,10280494,00100100' Controls : 21 Simple ctrls : 3 Channel: Unavailable Date: Tue Apr 8 14:25:11 2014 Extensions: extensions.sqlite corrupt or missing ForcedLayersAccel: False IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite) InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) IpRoute: default via 193.255.160.1 dev eth0 proto static 169.254.0.0/16 dev eth0 scope link metric 1000 193.255.160.0/23 dev eth0 proto kernel scope link src 193.255.160.48 metric 1 Locales: extensions.sqlite corrupt or missing MarkForUpload: True MostRecentCrashID: bp-e838124b-7e27-4001-bba3-7c4442140319 PrefSources: prefs.js [Profile]/extensions/{3d7eb24f-2740-49df-8937-200b1cc08f8a}/defaults/preferences/flashblock.js Profiles: Profile0 (Default) - LastVersion=28.0/20140317233623 (In use) RelatedPackageVersions: google-talkplugin 5.2.4.0-1 icedtea-7-plugin 1.2.3-0ubuntu0.12.04.4 rhythmbox-mozilla 2.96-0ubuntu4.3 totem-mozilla 3.0.1-0ubuntu21.1 gnome-shell 3.4.1-0ubuntu2 RunningIncompatibleAddons: False SourcePackage: firefox Themes: extensions.sqlite corrupt or missing UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 10/18/2011 dmi.bios.vendor: Dell Inc. dmi.bios.version: A08 dmi.board.name: 0692FT dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 9 dmi.chassis.vendor: Dell Inc. dmi.modalias: dmi:bvnDellInc.:bvrA08:bd10/18/2011:svnDellInc.:pnLatitudeE6520:pvr01:rvnDellInc.:rn0692FT:rvrA00:cvnDellInc.:ct9:cvr: dmi.product.name: Latitude E6520 dmi.product.version: 01 dmi.sys.vendor: Dell Inc. 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