As soon as it gets popular enough to get on the hackers' radar screen, it'll be attacked like everything else.
I believe much of the attacks depend on Active X which Firefox doesn't use! Thus more secure.... improve your security by moving to Linux....
Websites ought to be designed in accord with the universal standards set by the World Wide Web Consortium in Cambridge. But for many designers, the temptation to use Microsoft's specialized features was irresistible. They especially like ActiveX, which basically lets the Microsoft browser install new software on a Web surfer's machine. Since ActiveX is also used by worm and spyware writers to smuggle their code onto computers, Firefox doesn't use it. This is a key reason why it's a safer browser than IE, but also a barrier when visiting some websites.
True. But since IE comes bundled with windows (and most users are either uninformed or just don't care), I doubt that security problems with Mozilla browsers will reach the level associated with IE any time soon.