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
All of them.
USAA doesn't not require that I use only Chrome.
You should have read what I said before, it doesn't require you to. Consumer clients are generally immune to the problem. Not all of their customers are.
I can't help you if you choose to ignore what I say, and rely solely on your own anecdotal evidence.
Good day to you sir.