I'd suggest you look into just what those 'exploits' are before getting all panicky. the last Firefox one i saw a lot of people carrying on about was one where if a website address could be 'spoofed' by replacing certain international characters with characters that looked similar, some small degree of access could be obtained. Hardly likely to affect you, and not really anything drastic, the way I read it.

Hardly comparable, either, to the risks faced by IE users

It'll get worse over time, as more people change browsers, but for the moment there are better choices by far than IE.