Firefox Portable faulting module cofffw.dll

Hello,

 

Has anyone experienced problems with Firefox Portable and Norton Online Family? I am running a distance learning program that uses a customized viewer using VLC and Firefox Portable. Recently it started crashing with this error:

 

Faulting application firefox.exe, version 1.8.20080.17373, faulting module cofffw.dll, version 2010.5.1.21, fault address 0x00023121.

 

If I uninstall Online Family, it works fine.  Any ideas are welcome.

 

Thanks,

 

Curt