<p>firefox didnt do anything, and you can always reinstall as long as you have the cd, and you probably just downloaded a virus yourself while USING firefox, not because of firefox, because you were tricked into clicking a link or downloading a file</p>
<p>so in summary,
you probably caused this problem, not firefox</p>
<p>and UnleashedFury is right,
why do you need anything else?</p>