looks like rendering adblockers extensions obsolete with manifest-v3 was not enough so now they try to implement DRM into the browser giving the ability to any website to refuse traffic to you if you don't run a complaint browser ( cough...firefox )
here is an article in hacker news since i'm sure they can explain this to you better than i.
and also some github docs
I'm a totally separate person, and I can also verify that forcing business users to use IE for certain services is definitely a thing.
I'm not sure what your point is? It's not necessarily going to apply to ALL banks, but it'll probably apply to SOME of them, and that will suck if it happens to be your/my bank.