ATTACK FROM ANOTHER COMPUTER

Hello i have norton antivirus 2010 version.  They keep blocking an attack to my computer. 

 

It says risk name: HTTP FRAGUS TOOLKIT REQUEST 1. 

 

The attack was from. \DEVICE\HARDDISKVOLUME2\PROGRAM FILES (x86)\MOZILLA FIREFOX\FIREFOX.EXE.

 

Can someone help me and tell me what this is.  ANd if anything i can do to get rid of this.