As has been mentioned before, You'll have less issues with web pages not rendering properly with FF than with Opera despite the Web Standards acid2 test working on Opera and not on Firefox (or IE for that matter):
http://www.webstandards.org/files/acid2/test.html Its only the Minor browsers that work with it. Opera, Safari 2(Mac) and Konqueror (Linux). Microsoft and Mozilla have paid lip service to the effort.
Hackers have no difficulty to do anything so firefox or Opera has nothing to do with hackers. If you are on the target then nothing can save you.
And I thought I had defeatist tendencies..........
Most 'hacking' isn't targeted its fling the **** everywhere and see where it sticks. It sticks on the insecure systems and those with insecure habits. Good security can keep out the targeted stuff, they can only get in if there's a way in, security is about not giving them a way in. I wouldn't believe so many movies if I were you.
FF is being used my many ppl so many Exploits are bein found out
__________________ When you are in light, everything will follow you..... But when you enter dark, even your own shadow will not follow you. That is Life!