Thank you for reporting this to Ubuntu. Sometimes Firefox profiles can become corrupt and/or extensions can conflict. Could you please try this with a new profile and see if the problem still exists? You do not need to delete your old profile to test. If this helps, you might want to try to disable all your extensions and re-enable them one by one until you find the problematic one.
You can start the profile manager with the following command: firefox -ProfileManager Alternatively, do you have a Mozilla Crash Report ID (available in about:crashes) ** Changed in: firefox (Ubuntu) Status: New => Incomplete -- 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/925752 Title: firefox crash after update Status in “firefox” package in Ubuntu: Incomplete Bug description: after automatic updates, Firefox has been updated to version 9, and this has resulted in the loss of bookmarks and history. I tried to upgrade to version 10, but the problem remained, and more if I try to open multiple tabs and a few sites like youtube, firefox keeps me going 130% cpu and the browser becomes unusable!! ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: firefox 9.0.1+build1-0ubuntu0.11.10.2 ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu4 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: Intel [HDA Intel], device 0: ALC269 Analog [ALC269 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: barby 1917 F.... pulseaudio BuildID: 20111228084940 CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xfc700000 irq 43' Mixer name : 'Intel IbexPeak HDMI' Components : 'HDA:10ec0269,144dc06a,00100004 HDA:80862804,80860101,00100000' Controls : 18 Simple ctrls : 10 Channel: release Date: Thu Feb 2 22:32:58 2012 ForcedLayersAccel: False IfupdownConfig: auto lo iface lo inet loopback InstallationMedia: Kubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427) IpRoute: default via 172.20.2.1 dev eth0 proto static 169.254.0.0/16 dev eth0 scope link metric 1000 172.20.2.0/24 dev eth0 proto kernel scope link src 172.20.2.164 metric 1 Plugins: Skype Buttons for Kopete - Lib=skypebuttons.so, Location=/usr/lib/mozilla/plugins Shockwave Flash - Lib=npwrapper.libflashplayer.so, Location=/var/lib/flashplugin-installer IcedTea-Web Plugin (using IcedTea-Web 1.1.3 (1.1.3-1ubuntu1.1)) - Lib=IcedTeaPlugin.so, Location=/usr/lib/jvm/java-6-openjdk/jre/lib/amd64 ProcEnviron: PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash Profiles: Profile0 (Default) - LastVersion=9.0.1/20111228084940 (Running) RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: Upgraded to oneiric on 2011-10-18 (107 days ago) dmi.bios.date: 06/21/2010 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: 08JV.M029.20100621.hkk dmi.board.asset.tag: Tag 12345 dmi.board.name: R530/R730/R540 dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD. dmi.chassis.version: N/A dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr08JV.M029.20100621.hkk:bd06/21/2010:svnSAMSUNGELECTRONICSCO.,LTD.:pnR530/R730/R540:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnR530/R730/R540:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A: dmi.product.name: R530/R730/R540 dmi.product.version: Not Applicable dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/925752/+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