Is this Legit? "coFirefoxPlugIn"

In a scan of my computer by a virus software, I received notification of something installed on my computer apparently by Symantec called  "coFirefoxPlugIn" - asking me whether I wish to have it disabled. 

 

I don't know the answer to that question and am wondering if it is a Symantec product or not?  I am attaching a "snipit" of what the scan provided to me.

 

Thanks.Nov 20, 2012 SpyHunter Report re Norton re FireFox Plugin.PNG