You must have lousy security systems in banks there.
I've been doing all my banking online for at least 8 years now (using mostly IE for that) and have never had any problems, with domestic hackers or otherwise.
Anyway, I picked IE since I happened to reply to the poll at home. And I use IE for most boards at home, and Firefox for a lot of other things (since I prefer to stay logged in all the time, and Firefox already has the automatic login set for the same boards for another person
). Usually have both running side by side, with perhaps 2-3 IE windows open and the rest of the net browsing done in 5-6-12 Firefox tabs.
At work I use Mozilla almost exclusively, apart from certain work things that require using IE occasionally (accessing our clients' intranets etc when needed, or needing the full functionality of Microsoft's website).
I used to use Firefox at work too, but one day it crashed irrepairably and after that, reinstalling it (have tried with a couple of newer versions since then) has proved to be impossible: it will exhibit the exact same behaviour that the old crashed version did (even though I've always uninstalled the old before trying to install again, plus manually deleted everything Firefox-related I could find in program files & the registry as well - I guess I have to be missing something, but I don't feel like a Windows reinstall to get rid of the issue).