do you mean FireFox?? - It's a browser by Mozilla

[With more than 15,000 improvements, Firefox 3 is faster, safer and smarter than ever before.]
{FF is very nice - you might as well try it out since you have it installed already}

here's a listing of free anti virus for information and if you want to download - it's a good place -
http://www.download.com/3120-20_4-0....rus&tag=srt.er