Can anyone tell me about mozilla firefox in terms of speed, safety, and efficiency based on that? than the IE, Netscape and other web browsers.
Firefox exceeds almost everything that IE and NS has. Sure there are small differences here and there and seldom incompatibility issues, but they’re fixable.
How faster, more safely, and more efficiently is mozilla firefox?
allot 
I agree with T-O. And if you use OS X, then stop using IE and use Safari. Please.
