It's indeed probably due to something special in 12.04 because on a relatively similar configuration with 11.10 and firefox 11 (firefox sync'd), this bug is not present.
So I've tried disabling the icons with "GLOBAL_MENU_NO_ICONS=1 firefox" but it didn't change anything. That said, I'm a bit doubting whether it really worked because the icons were still present in the menu. As for the backtrace, see the attached file (i've taken two bt at different times). It seems like all the time is spent in dbusmenu_menuitem_get_id() ... Is this hinting you on something? Now I'm going to try the included XPI with firefox-beta, and report later... ** Attachment added: "backtrace when firefox freezes" https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/964584/+attachment/2943554/+files/firefox-slow-menu.gdb -- 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/964584 Title: Firefox hangs temporarily everytimes it receives the focus Status in “firefox” package in Ubuntu: Incomplete Bug description: In 12.04 beta, with unity, every times firefox gets the focus, it blocks for a couple of seconds (~10 second on my laptop) while loading all the processors fully. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: firefox 11.0+build1-0ubuntu1 ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12 Uname: Linux 3.2.0-20-generic x86_64 AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.95-0ubuntu1 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: piel 1633 F.... pulseaudio BuildID: 20120313141247 Channel: release Date: Sun Mar 25 16:44:54 2012 ForcedLayersAccel: False IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120301) Profiles: Profile0 (Default) - LastVersion=11.0/20120313141247 (Running) RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/22/2011 dmi.bios.vendor: Hewlett-Packard dmi.bios.version: 68MSP Ver. F.10 dmi.board.name: 30C9 dmi.board.vendor: Hewlett-Packard dmi.board.version: KBC Version 75.28 dmi.chassis.asset.tag: CZC8031BZF dmi.chassis.type: 10 dmi.chassis.vendor: Hewlett-Packard dmi.modalias: dmi:bvnHewlett-Packard:bvr68MSPVer.F.10:bd04/22/2011:svnHewlett-Packard:pnHPCompaq2510p:pvrF.10:rvnHewlett-Packard:rn30C9:rvrKBCVersion75.28:cvnHewlett-Packard:ct10:cvr: dmi.product.name: HP Compaq 2510p dmi.product.version: F.10 dmi.sys.vendor: Hewlett-Packard To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/964584/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
