Sorry, that doesn't help much. It looks as if you are now using an older version of Firefox (12.0) on the laptop than you were when you reported this bug (firefox 15.0.1+build1-0ubuntu0.12.04.1).
Compiz is indeed the name of the OpenGL-using compositor being used behind Unity3D. It has had some notable fixes recently if you want to try reinstalling Ubuntu on the laptop and updating compiz and unity to the latest versions, and updating Firefox to version 18. -- 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/1050730 Title: Firefox on Unity3D unusabley slow Status in “firefox” package in Ubuntu: Incomplete Bug description: After running firefox for a few minutes it starts to get very very slow. After several hours it becomes essentially frozen. Checking top I see Firefox and Compiz both high usage. Firefox ~ 100% and Compix ~24% (dual CPU 200% total) Using Unity2D I do not have the problem. I have only noticed this problem on Firefox. All other apps seem to be working OK. I have reported this using ubuntu-bug that collected a lot of information so I assume you have all the relevant version info. If not I can supply it. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: firefox 15.0.1+build1-0ubuntu0.12.04.1 ProcVersionSignature: Ubuntu 3.2.0-30.48-generic 3.2.27 Uname: Linux 3.2.0-30-generic x86_64 NonfreeKernelModules: fglrx wl AddonCompatCheckDisabled: False AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu13 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 1: Generic_1 [HD-Audio Generic], device 0: ALC269VB Analog [ALC269VB Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: worik 4315 F.... pulseaudio /dev/snd/controlC0: worik 4315 F.... pulseaudio BuildID: 20120907231657 CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'Generic'/'HD-Audio Generic at 0xf0244000 irq 43' Mixer name : 'ATI R6xx HDMI' Components : 'HDA:1002aa01,00aa0100,00100200' Controls : 6 Simple ctrls : 1 Card0.Amixer.values: Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Card1.Amixer.info: Card hw:1 'Generic_1'/'HD-Audio Generic at 0xf0240000 irq 16' Mixer name : 'Realtek ALC269VB' Components : 'HDA:10ec0269,1025059f,00100100' Controls : 20 Simple ctrls : 11 Channel: Unavailable Date: Fri Sep 14 16:11:16 2012 DefaultProfilePrefErrors: Unexpected character 'e' before comma @ [Profile]/extensions/[email protected]/defaults/preferences/defaults.js:25 'utf8' codec can't decode byte 0x91 in position 697: invalid start byte DefaultProfilePrefSources: prefs.js [Profile]/extensions/[email protected]/defaults/preferences/defaults.js [Profile]/extensions/{b9db16a4-6edc-47ec-a1f4-b86292ed211d}/defaults/preferences/prefs-dwhelper.js [Profile]/extensions/[email protected]/defaults/preferences/inspector.js ForcedLayersAccel: False InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425) IpRoute: default via 192.168.1.1 dev eth0 proto static 169.254.0.0/16 dev eth0 scope link metric 1000 192.168.1.0/24 dev eth0 proto kernel scope link src 192.168.1.43 metric 1 192.168.1.0/24 dev eth1 proto kernel scope link src 192.168.1.227 metric 2 MostRecentCrashID: bp-986c8475-bb62-497e-9831-fbe742120520 ProcEnviron: LANGUAGE=en_NZ:en TERM=screen-bce PATH=(custom, no user) LANG=en_NZ.UTF-8 SHELL=/bin/bash Profile1PrefSources: prefs.js Profiles: Profile0 (Default) - LastVersion=15.0.1/20120907231657 (In use) Profile1 - LastVersion=12.0/20120423122843 (Out of date) RelatedPackageVersions: totem-mozilla 3.0.1-0ubuntu21.1 rhythmbox-mozilla 2.96-0ubuntu4.1 RunningIncompatibleAddons: False SourcePackage: firefox UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 06/24/2011 dmi.bios.vendor: Phoenix Technologies Ltd. dmi.bios.version: V1.07 dmi.board.asset.tag: No Asset Tag dmi.board.name: Aspire 5560 dmi.board.vendor: Acer dmi.board.version: A11 dmi.chassis.asset.tag: Asset Tag dmi.chassis.type: 9 dmi.chassis.vendor: Acer dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvrV1.07:bd06/24/2011:svnAcer:pnAspire5560:pvr0.1:rvnAcer:rnAspire5560:rvrA11:cvnAcer:ct9:cvr0.1: dmi.product.name: Aspire 5560 dmi.product.version: 0.1 dmi.sys.vendor: Acer no_proxy: localhost,127.0.0.0/8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1050730/+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

