Unfortunately your crash report did not contain clues that helped me.

Two things you may not yet have tried, that could well help

1. Start in Windows own Safe mode. That may help as it will for instance isolate any plugins. Up to Windows 8 that used the F8 key when booting.
   http://windows.microsoft.com/en-us/windows/start-computer-safe-mode#start-computer-safe-mode=windows-7
2. Try a Clean Install involving deleting program files (but do NOT delete profile files)
   Troubleshoot and diagnose Firefox problems_5-reinstall-firefox

EDIT, for forum cross referencing purposes

• Crash Reports for your crash IDs
  bp-ea4a22dc-da4a-4b18-95f0-c305a2131223
  f80da5d8-338b-45a5-b9e6-008812131223
  (results not found on others)
• Crash Signature: nsTArray_base<nsTArrayInfallibleAllocator, nsTArray_CopyElements<nsRefPtr<nsXULPrototypeDocument> > >::IncrementLength(unsigned int) | nsHttpHandlerConstructor </li>
• No bug reports mentioned. OP mentions

Microsoft Safety Scanner and it found a Trojan called Win32/Gatak.DL 

Maybe some more crash Id's will help.

1. Press the following shortcut to get a Run window: [Windows] + [R]. This should bring up a window that contains a text field.
2. In that text field, enter %APPDATA% and press Enter. An explorer window should open.
3. From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
4. Now, you should see a list of files that contain reports. Go to View > Arrange Icons by > Modified to get the most recent files at the top of the window.
5. Open the most recent 5 files with a text editor and copy the IDs.
6. Paste each ID with bp- into the reply window on the forums.

Thanks in advance!

You can find more information and troubleshooting steps in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

thanks

some other crash IDs are

bp-771e6520-549d-4d02-b0e8-743a02130319 bp-a9a2edce-fdbd-4525-8aff-524e62130226 bp-ea4a22dc-da4a-4b18-95f0-c305a2131223 bp-f80da5d8-338b-45a5-b9e6-008812131223

Sometimes a problem with Firefox may be a result of malware installed on your computer, that you may not be aware of.

You can try these free programs to scan for malware, which work with your existing antivirus software:

• Microsoft Safety Scanner
• MalwareBytes' Anti-Malware
• TDSSKiller - AntiRootkit Utility
• Hitman Pro
• ESET Online Scanner

Microsoft Security Essentials is a good permanent antivirus for Windows 7/Vista/XP if you don't already have one.

Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Did this fix your problems? Please report back to us!

Hi Fred thanks for the suggestions

I ran a scan with the Microsoft Safety Scanner and it found a Trojan called Win32/Gatak.DL

I removed it and at the moment Firefox is loading without the Crash Reporter being displayed :)

I will monitor it over the next few days to see if the problem is resolved

many thanks

Good news. But don't stop with just one scan, or just one program. Run several scans using two or more scanners just to be safe. And ever so often, scan you system again, say, every month give or take. Happy Computing. And Merry Holidays.

Hello,

I am also glad to hear that your problem has been resolved.

If you have not already, please mark this thread as solved by marking the solution (fredmcd's malware removal post).
This will help other users experiencing similar problems find help faster and more efficiently (through search).

I hope you continue using our products and thank you for contacting Mozilla Support.

David, I am glad you have Firefox working again. I marked the thread as solved,after reading your reply above.

If you do find further malware please say what it is, and if your problem does continue please unmark the solution and explain what is the problem now.

Thanks John