If we're presenting e.g. a reallylongdomainname.com, it'd say something like:
  Presenting (reallylongdomain...
When I believe what we want per the Enamel URL guidelines [1] is:
  Presenting (...gdomainname.com)

It'd probably make sense to have a CSS/JS solution that covers all the MRPs.

[1] https://www.chromium.org/Home/chromium-security/enamel#TOC-Eliding-Origin-Names-And-Hostnames