I just upgraded to FF 4.0, and am overall unhappy with the app. It runs much slower than my previous version, and continually hangs...even on the Mozilla websites. I'm going to try and go back to my older version, which I loved.

As noted in my question, FF4.0 continually hangs (Not responding) even on your website.

http://support.mozilla.com/en-US/kb/Installing+a+previous+version+of+Firefox
http://www.mozilla.com/en-US/firefox/all-older.html

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    Step 1 results
    com.symantec.kext.internetSecurity (1.3.2f5)
    com.symantec.kext.ips (3.2f8)
    com.cisco.nke.ipsec (2.0.1)
    com.symantec.kext.SymAPComm (11.1.2f17)
    Step 2 results
    org.macosforge.xquartz.privileged_startx
    com.symantec.symSchedDaemon.plist
    com.symantec.symdaemon
    com.symantec.sharedsettings
    com.symantec.Sched501-2.plist
    com.symantec.Sched501-1.plist
    com.symantec.navapdaemonsl
    com.symantec.navapd
    com.symantec.MissedTasks.plist
    com.symantec.diskMountNotify.plist
    com.symantec.avscandaemon
    com.micromat.TechToolProDaemon
    com.google.keystone.daemon
    com.bombich.ccc
    Step 3 result
    org.macosforge.xquartz.startx
    com.symantec.uiagent.application
    com.prosofteng.DGMonitor
    com.micromat.TechToolProAgent
    com.google.keystone.root.agent
    com.google.Chrome.framework.service_process/Users/damian/Library/Application_Sup port/Google/Chrome
    com.ecamm.printopia
    com.adobe.ARM.df0ab5bbe6f698196fcc21e3c1e66dcb758bd911f4d637272d9d8109
    Step 4 result
    /Library/Components:
    /Library/Extensions:
    /Library/Frameworks:
    AEProfiling.framework
    AERegistration.framework
    Adobe AIR.framework
    AudioMixEngine.framework
    Frameworks
    NyxAudioAnalysis.framework
    PluginManager.framework
    R.framework
    TSLicense.framework
    cisco-vpnclient.framework
    iLifeFaceRecognition.framework
    iLifeKit.framework
    iLifePageLayout.framework
    iLifeSQLAccess.framework
    iLifeSlideshow.framework
    /Library/Input Methods:
    /Library/Internet Plug-Ins:
    .DS_Store
    Flash Player.plugin
    Flip4Mac WMV Plugin.plugin
    Google Earth Web Plug-in.plugin
    JavaAppletPlugin.plugin
    OfficeLiveBrowserPlugin.plugin
    Quartz Composer.webplugin
    QuickTime Plugin.plugin
    RealPlayer Plugin.plugin
    Silverlight.plugin
    Unity Web Player.plugin
    Unused
    flashplayer.xpt
    googletalkbrowserplugin.plugin
    iPhotoPhotocast.plugin
    npgtpo3dautoplugin.plugin
    nsIQTScriptablePlugin.xpt
    /Library/Keyboard Layouts:
    /Library/LaunchAgents:
    com.google.keystone.agent.plist
    com.micromat.TechToolProAgent.plist
    com.prosofteng.DGMonitor.plist
    com.symantec.uiagent.application.plist
    org.macosforge.xquartz.startx.plist
    /Library/LaunchDaemons:
    com.apple.remotepairtool.plist
    com.bombich.ccc.plist
    com.google.keystone.daemon.plist
    com.micromat.TechToolProDaemon.plist
    com.symantec.MissedTasks.plist
    com.symantec.Sched501-1.plist
    com.symantec.Sched501-2.plist
    com.symantec.avscandaemon.plist
    com.symantec.diskMountNotify.plist
    com.symantec.navapd.plist
    com.symantec.navapdaemonsl.plist
    com.symantec.sharedsettings.plist
    com.symantec.symSchedDaemon.plist
    com.symantec.symdaemon.plist
    org.macosforge.xquartz.privileged_startx.plist
    /Library/PreferencePanes:
    Flash Player.prefPane
    Flip4Mac WMV.prefPane
    SymantecQuickMenu.prefPane
    TechTool Protection.prefPane
    /Library/PrivateFrameworks:
    SymAVScan.framework
    SymAppKitAdditions.framework
    SymBase.framework
    SymDaemon.framework
    SymIPS.framework
    SymIR.framework
    SymInternetSecurity.framework
    SymScheduler.framework
    SymSharedSettings.framework
    SymSubmission.framework
    SymUIAgent.framework
    SymUIAgentUI.framework
    /Library/PrivilegedHelperTools:
    com.bombich.ccc
    /Library/QuickLook:
    GBQLGenerator.qlgenerator
    iWork.qlgenerator
    /Library/QuickTime:
    AppleIntermediateCodec.component
    AppleMPEG2Codec.component
    Flip4Mac WMV Advanced.component
    Flip4Mac WMV Export.component
    Flip4Mac WMV Import.component
    Google Camera Adapter 0.component
    Google Camera Adapter 1.component
    /Library/ScriptingAdditions:
    /Library/Spotlight:
    GBSpotlightImporter.mdimporter
    LogicPro.mdimporter
    Microsoft Office.mdimporter
    iWork.mdimporter
    /Library/StartupItems:
    /etc/mach_init.d:
    /etc/mach_init_per_login_session.d:
    /etc/mach_init_per_user.d:
    Library/Address Book Plug-Ins:
    SkypeABDialer.bundle
    SkypeABSMS.bundle
    Library/Fonts:
    Library/Input Methods:
    .localized
    Library/Internet Plug-Ins:
    Google Earth Web Plug-in.plugin
    WebEx.plugin
    fbplugin_1_0_3.plugin
    Library/Keyboard Layouts:
    Library/LaunchAgents:
    com.adobe.ARM.df0ab5bbe6f698196fcc21e3c1e66dcb758bd911f4d637272d9d8109.plist
    com.apple.AddressBook.ScheduledSync.PHXCardDAVSource.E9E876AD-F4B4-43BE-A4F2-EC7 33492E799.plist
    com.ecamm.printopia.plist
    com.google.Chrome.framework.plist
    Library/PreferencePanes:
    Printopia.prefPane
    Step 5 result
    AdobeResourceSynchronizer, iTunesHelper, Air Video Server

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