I can get to the password entry screen with Firefox 126.96.36.199. Can't go any further because I don't have an account with them.
Originally Posted by Emerson
To access internet banking, please use:
* Internet Explorer version 5.0 or above; or
o Netscape Communicator version 4.72 or above (version 6.x currently not supported)
So install Netscape 4.xx. Every distro was packaging it at some stage. It shouldn't be that hard to find.