My Bank's internet banking requires IE or Netscape. I don't think it's worth changing banks over a browser. I use Firefox for most browsing, but I use IE for online banking.
Ummm, you do realize that Netscape is built on Mozilla? I have not found any site that supports Netscape, limiting access to my Firefox.
Have you actually tried using Firefox on your bank site, or did you just take their supported browsers at face value? I access both BankOne/Chase and Nat.'l City websites just fine with Firefox.