I have noticed this on both my Lubuntu 12.04 and Xubuntu 13.04 machine... When I am typing into the comment field on someones Facebook post, the CPU hangs at 100% until I close Firefox.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1268417 Title: Facebook home page takes a lot of CPU Status in “firefox” package in Ubuntu: Confirmed Bug description: Maybe this is Firefox bug, as the page does not take that much CPU when using chromium-browser. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: firefox 26.0+build2-0ubuntu0.13.10.2 ProcVersionSignature: Ubuntu 3.11.0-15.23-generic 3.11.10 Uname: Linux 3.11.0-15-generic x86_64 AddonCompatCheckDisabled: False ApportVersion: 2.12.5-0ubuntu2.2 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: jarno 3775 F.... panel-12-mixer BuildID: 20131206145143 CRDA: Error: [Errno 2] No such file or directory: 'iw' Channel: Unavailable Date: Mon Jan 13 01:34:00 2014 EcryptfsInUse: Yes 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 2013-09-20 (114 days ago) InstallationMedia: Lubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1) IpRoute: default via 192.168.0.254 dev wlan0 proto static 192.168.0.0/24 dev wlan0 proto kernel scope link src 192.168.0.101 metric 9 Locales: extensions.sqlite corrupt or missing MarkForUpload: True MostRecentCrashID: bp-f2914879-08f3-477f-92ad-0ec542140111 PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=26.0/20131206145143 (In use) PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon. RelatedPackageVersions: google-talkplugin 4.9.1.0-1 gecko-mediaplayer 1.0.8-4ubuntu1 RfKill: 0: phy0: Wireless LAN Soft blocked: no Hard blocked: no RunningIncompatibleAddons: False SourcePackage: firefox SubmittedCrashIDs: bp-f2914879-08f3-477f-92ad-0ec542140111 bp-b022607d-fa4c-4923-a0f0-a0cb42140101 Themes: extensions.sqlite corrupt or missing UpgradeStatus: Upgraded to saucy on 2013-10-18 (86 days ago) dmi.bios.date: 09/13/06 dmi.bios.vendor: LENOVO dmi.bios.version: 63ET13WW dmi.board.name: CAPELL VALLEY(NAPA) CRB dmi.board.vendor: LENOVO dmi.board.version: Not Applicable dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnLENOVO:bvr63ET13WW:bd09/13/06:svnLENOVO:pn89224MG:pvr3000C200:rvnLENOVO:rnCAPELLVALLEY(NAPA)CRB:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A: dmi.product.name: 89224MG dmi.product.version: 3000 C200 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1268417/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

