A new report by Symantec states that last year the Mozilla Foundation disclosed 25 vendor-confirmed vulnerabilities, 18 of which were classified as high-risk by Symantec. IE by comparison released 13 vendor-confirmed vulnerabilities, 8 of which were classified as high-risk.

Read the full article here:

http://news.com.com/Symantec+Mozilla...3-5873273.html

This seems odd to me, because I feel like IE is the main conduit by which parasites and spyware are introduced to your machine. Is the parasite problem just as high with Firefox or Moziilla?