It had been only on the streets for five minutes, but the 'more secure' open source browser Firefox has already found to have a zero day flaw.
According to the Security outfit Digital Vaccine Laboratories, it is the first critical hole found in the browser. To be fair it is also found in Firefox 2.0.x. It has been reported the vulnerability to the Mozilla security team who are probably still suffering from the launch party hang-over.
It also requires user interaction to exploit such as clicking on a link in email or visiting a malicious web page. So far DV labs are not giving any details of the flaw until the Mozilla team takes its antacid tablets, aspirins, and come up with a fix.