What version of Firefox are you using? Are you certain that you have Firefox allowed in your firewall?
Are you certain you have Firefox set to operate ONLINE. Go to File and click and make sure there is NO checkmark next to Work Offline
We need more info on your computer itself and the programs you are using; Operating System, Anti-Virus program, Firewall and any other security programs you may have running.
Have you rebooted the computer and tried again to use Firefox?

Firefox version 3.0.4 and yes firefox is allowed and not offline. I did reboot and uninstalled the program then reinstalled, it now seems that it won't work from google.ie/.com but will work for yahoo or some other search engine.

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 18:27:34, on 08/09/2009
Platform: Windows Vista SP1 (WinNT 6.00.1905)
MSIE: Internet Explorer v8.00 (8.00.6001.18813)
Boot mode: Normal

Running processes:
C:\Windows\system32\Dwm.exe
C:\Windows\system32\taskeng.exe
C:\Windows\Explorer.EXE
C:\Program Files\Windows Defender\MSASCui.exe
C:\Program Files\Intel\Intel Matrix Storage Manager\IAAnotif.exe
C:\Program Files\Realtek\Audio\HDA\RtHDVCpl.exe
C:\Windows\System32\rundll32.exe
C:\Program Files\Common Files\Real\Update_OB\realsched.exe
C:\Windows\PixArt\PAC207\Monitor.exe
C:\Windows\vsnp2uvc.exe
C:\Program Files\Lexmark 3600-4600 Series\lxdxmon.exe
C:\Program Files\Lexmark 3600-4600 Series\ezprint.exe
C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\avp.exe
C:\Program Files\Windows Sidebar\sidebar.exe
C:\Users\Padraig\Program Files\DNA\btdna.exe
C:\Windows\ehome\ehtray.exe
C:\Windows\ehome\ehmsas.exe
C:\Program Files\Common Files\InstallShield\UpdateService\ISUSPM.exe
C:\Program Files\Mozilla Firefox\firefox.exe
C:\Program Files\Real\RealPlayer\realplay.exe
C:\Windows\system32\SearchFilterHost.exe
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.aldi.com/
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = http://www.aldi.com/
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = http://go.microsoft.com/fwlink/?LinkId=54896
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = http://go.microsoft.com/fwlink/?LinkId=54896
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = http://go.microsoft.com/fwlink/?LinkId=69157
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O1 - Hosts: ::1 localhost
O2 - BHO: AcroIEHelperStub - {18DF081C-E8AD-4283-A596-FA578C2EBDC3} - C:\Program Files\Common Files\Adobe\Acrobat\ActiveX\AcroIEHelperShim.dll
O2 - BHO: RealPlayer Download and Record Plugin for Internet Explorer - {3049C3E9-B461-4BC5-8870-4C09146192CA} - C:\Program Files\Real\RealPlayer\rpbrowserrecordplugin.dll
O2 - BHO: Spybot-S&D IE Protection - {53707962-6F74-2D53-2644-206D7942484F} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O2 - BHO: IEVkbdBHO - {59273AB4-E7D3-40F9-A1A8-6FA9CCA1862C} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\ievkbd.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre6\bin\jp2ssv.dll (file missing)
O4 - HKLM\..\Run: [Windows Defender] %ProgramFiles%\Windows Defender\MSASCui.exe -hide
O4 - HKLM\..\Run: [IAAnotif] "C:\Program Files\Intel\Intel Matrix Storage Manager\Iaanotif.exe"
O4 - HKLM\..\Run: [RtHDVCpl] C:\Program Files\Realtek\Audio\HDA\RtHDVCpl.exe
O4 - HKLM\..\Run: [Skytel] C:\Program Files\Realtek\Audio\HDA\Skytel.exe
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\Windows\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [NvMediaCenter] RUNDLL32.EXE C:\Windows\system32\NvMcTray.dll,NvTaskbarInit
O4 - HKLM\..\Run: [TkBellExe] "C:\Program Files\Common Files\Real\Update_OB\realsched.exe" -osboot
O4 - HKLM\..\Run: [PAC207_Monitor] C:\Windows\PixArt\PAC207\Monitor.exe
O4 - HKLM\..\Run: [Adobe Reader Speed Launcher] "C:\Program Files\Adobe\Reader 9.0\Reader\Reader_sl.exe"
O4 - HKLM\..\Run: [snp2uvc] C:\Windows\vsnp2uvc.exe
O4 - HKLM\..\Run: [lxdxmon.exe] "C:\Program Files\Lexmark 3600-4600 Series\lxdxmon.exe"
O4 - HKLM\..\Run: [EzPrint] "C:\Program Files\Lexmark 3600-4600 Series\ezprint.exe"
O4 - HKLM\..\Run: [AVP] "C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\avp.exe"
O4 - HKCU\..\Run: [Sidebar] C:\Program Files\Windows Sidebar\sidebar.exe /autoRun
O4 - HKCU\..\Run: [BitTorrent DNA] "C:\Users\Padraig\Program Files\DNA\btdna.exe"
O4 - HKCU\..\Run: [ehTray.exe] C:\Windows\ehome\ehTray.exe
O4 - HKCU\..\Run: [VoipStunt] "C:\Program Files\VoipStunt.com\VoipStunt\voipstunt.exe" -nosplash -minimized
O4 - HKCU\..\Run: [ISUSPM] "C:\Program Files\Common Files\InstallShield\UpdateService\ISUSPM.exe" -scheduler
O4 - HKCU\..\Run: [WMPNSCFG] C:\Program Files\Windows Media Player\WMPNSCFG.exe
O4 - HKUS\S-1-5-19\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-19\..\Run: [WindowsWelcomeCenter] rundll32.exe oobefldr.dll,ShowWelcomeCenter (User 'LOCAL SERVICE')
O4 - HKUS\S-1-5-20\..\Run: [Sidebar] %ProgramFiles%\Windows Sidebar\Sidebar.exe /detectMem (User 'NETWORK SERVICE')
O8 - Extra context menu item: Add to Banner Ad Blocker - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\ie_banner_deny.htm
O8 - Extra context menu item: Add to Google Photos Screensa&ver - res://C:\Windows\system32\GPhotos.scr/200
O9 - Extra button: Web traffic protection statistics - {1F460357-8A94-4D71-9CA3-AA4ACF32ED8E} - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\SCIEPlgn.dll
O9 - Extra button: Send to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~3\Office12\ONBttnIE.dll
O9 - Extra 'Tools' menuitem: S&end to OneNote - {2670000A-7350-4f3c-8081-5663EE0C6C49} - C:\PROGRA~1\MICROS~3\Office12\ONBttnIE.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~3\Office12\REFIEBAR.DLL
O9 - Extra button: (no name) - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O9 - Extra 'Tools' menuitem: Spybot - Search & Destroy Configuration - {DFB852A3-47F8-48C4-A200-58CAB36FD2A2} - C:\PROGRA~1\SPYBOT~1\SDHelper.dll
O13 - Gopher Prefix:
O16 - DPF: {2019DC25-D1C0-11D6-97B3-0008A124F542} (StreamPlug Class) - http://www.streamplug.com/StreamPlug/beta/SP.cab
O18 - Protocol: skype4com - {FFC8B962-9B40-4DFF-9458-1830C7DD7F5D} - C:\PROGRA~1\COMMON~1\Skype\SKYPE4~1.DLL
O20 - AppInit_DLLs: C:\PROGRA~1\KASPER~1\KASPER~1\mzvkbd.dll,C:\PROGRA~1\KASPER~1\KASPER~1\adialhk.dll,C:\PROGRA~1\KASPER~1\KASPER~1\kloehk.dll
O23 - Service: Kaspersky Internet Security (AVP) - Kaspersky Lab - C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2009\avp.exe
O23 - Service: Google Update Service (gupdate1c9bcf1c42a0858) (gupdate1c9bcf1c42a0858) - Google Inc. - C:\Program Files\Google\Update\GoogleUpdate.exe
O23 - Service: Google Updater Service (gusvc) - Google - C:\Program Files\Google\Common\Google Updater\GoogleUpdaterService.exe
O23 - Service: Intel(R) Matrix Storage Event Monitor (IAANTMON) - Intel Corporation - C:\Program Files\Intel\Intel Matrix Storage Manager\Iaantmon.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: lxdxCATSCustConnectService - Lexmark International, Inc. - C:\Windows\system32\spool\DRIVERS\W32X86\3\\lxdxserv.exe
O23 - Service: lxdx_device - - C:\Windows\system32\lxdxcoms.exe
O23 - Service: Nero BackItUp Scheduler 3 - Nero AG - C:\Program Files\Nero\Nero8\Nero BackItUp\NBService.exe
O23 - Service: NMIndexingService - Nero AG - C:\Program Files\Common Files\Nero\Lib\NMIndexingService.exe
O23 - Service: NVIDIA Display Driver Service (nvsvc) - NVIDIA Corporation - C:\Windows\system32\nvvsvc.exe
O23 - Service: PLFlash DeviceIoControl Service - Prolific Technology Inc. - C:\Windows\system32\IoctlSvc.exe
O23 - Service: ProtexisLicensing - Unknown owner - C:\Windows\system32\PSIService.exe
O23 - Service: SBSD Security Center Service (SBSDWSCService) - Safer Networking Ltd. - C:\Program Files\Spybot - Search & Destroy\SDWinSec.exe

--
End of file - 7895 bytes

I am not certain what you mean here "IT" won't work from google.ie? What won't work? If you mean you cannot use google but you can use other search engines? You are using an old version of Firefox, current version is 3.5.3.

Yes that is correct, I tried the new version and had the same problem. I went back to the older version because some of my addons didn't work

Just a thought but it may be your proxy settings. Go to Tools>Options>Advanced>Network>Settings and see what is there. Try setting it to No proxy or automatically configure.

Yea thanks but it's not set to a proxy.

It turned out to be a badly needed update of which I received via automatic updates. So thanks for nothing Lol.

I am having pretty much the same trouble. Firefox will not load up at all. I have not made any changes either. It just won't load up. Can you give me some help? I tried to download the 3.6 version just to get it to load up and it would not finish the task.

Thanks for any help.
Betty Luurs