Earlier quoted context omitted.
Shinsei bank in Japan requires IE (not edge) to use online banking. Macs aren't supported.
This seems to be the case for most banks in Japan. Also a lot of government services. Last year I ended up posting some documents to immigration because I could not get their online form to work.
Shinsei is just a crap bank, and IIRC Mizuho can be a PITA depending on what you’re trying to do.