Hi Shane,
Note that both Firefox and Chromium refuse to display the hieroglyphics in the URL bar. My guess is that they display any IDN that they don't understand as punycode in order to minimize semantic attacks (I think there is a hieroglyph for the sun that looks like a circle that I guess could be confused for zero, so maybe this makes sense? maybe?).
since I had to do with this in the past, I happen to know how Firefox works: https://wiki.mozilla.org/IDN_Display_Algorithm The summary -after recursive resolution of all nested document calls- is that hieroglyphs are candidate characters for exclusions from identifiers, according to the Unicode Consortium: http://www.unicode.org/reports/tr31/#Table_Candidate_Characters_for_Exclusio... But your animated gif got a smile in my face. All the best, Marcos