You get your IT news from the register? Coool!
More seriously - you link to that page, with words that seem to indicate there are a LOT of Firefox exploits in the wild. Care to name some? The IRC exploit only counts as one.
One more time, I'll point up Firefox's main advantage over IE: Vulnerabilities are made public, and people actually address the vulnerabilities as quickly as possible. Firefox exploits aren't hidden under a mountain of shit by some corporate boss, so that he hopes they can go away.
IMHO, Firefox is just about as safe as a browser can be, today, based on current knowledge. It ranks right up there with Chrome and Opera, and Safari, and Konqueror.
IMHO, Internet Explorer MIGHT be almost as secure - if and when people finally upgrade from IE6 to at least 7, and preferably 8. MIGHT BE. You'll notice that MS didn't publicize this newest vulnerability, until Google and others had already done so.