How do I report an apparent virus to Firefox? I seem to have been infected when downloading Firefox

Question

I appear to have downloaded the JS/Agent.A and JS/Agent.B viruses when I downloaded Firefox. Is this possible? The evidence for this is that the virus arrived at the same time as the download, and appeared in the C:/Program files/Mozilla Firefox/chrome directory. It appears to have used Firefox to access some log-in details and reported them to a third party. I could find no way to report this directly to Firefox via the website, and would like to do so.
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; GTB6.5; .NET CLR 1.1.4322; InfoPath.1; .NET CLR 2.0.50727; .NET CLR 3.0.04506.30; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)

Answer 1

Paul,
A/V programs look for patterns in code that look suspicious to the A/V application, but the A/V program will not flag files that are known to contain that pattern if the internal A/V detection files know those specific files are part of a valid application. We usually see postings about problems like you are having immediately after a Firefox update, because the users A/V program vendor was slow adding the new Firefox files to their database and slow in sending those updates to their users. We have seen repeated problems from a few A/V vendors over the years, usually the suspected problem goes away when the user forces an update manually thru the offending A/V program.
I can only guess that your A/V program flagged something in Firefox because it was a newly installed program, and it didn't expect it to be installed.
As long as you are downloading Firefox from a Mozilla download mirror website, the chances are slim to none that you will get a true virus as a result of downloading and installing Firefox. Which is why you should only download Firefox from an official Mozilla web page, like this:
http://www.mozilla.com/en-US/firefox/firefox.html
Sorry, you had that problem.