hey,

can you start Firefox in safe mode and check if its working or not?

• See safe mode article for more info

Thanks Swarnava

It's because of spyware problem

• www.removespywareguides.com/fiminent-wincore-dll-how-to-remove.html

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

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!

Thanks Ajay.Yes I think it was a spyware problem.Still I am not sure it has gone.wait for another day!

It because of the spyware u are using . kindly uninstall it and see whether the firefox is working fine or not !! I presume it will work fine

It's completely due to firefox and can be easily mitigated by uninstalling all the spyware! Plus,It's highly recommended that you scan your PC with an antivirus because it might also be a problem!