There is an open Chromium bug for this: https://bugs.chromium.org/p/chromium/issues/detail?id=378566

I hope they consider it still valid and not close it.

These are the blocked ports: https://github.com/chromium/chromium/blob/83.0.4103.53/net/b...

Accessing localhost and LAN addresses works perfectly fine, except for those ports.

I am going to patch Bromite so that it doesn't allow any access to localhost nor private networks.