"Visually identical" is never good enough. Have you heard of attacks confusing Latin letters and Cyrillic letters? For example C versus С. (The latter is known as CYRILLIC CAPITAL LETTER ES.) Have you heard of NFC forms versus NFD forms? For example é versus é (LATIN SMALL LETTER E + COMBINING ACUTE ACCENT versus LATIN SMALL LETTER E WITH ACUTE.)
Nothing that's important when it comes to security and privacy should rely on a "visually identical" check. Fortunately browsers these days are already good at this; their address bars use puny code for the domain and percent encoding for the rest of the URL.
Nothing that's important when it comes to security and privacy should rely on a "visually identical" check. Fortunately browsers these days are already good at this; their address bars use puny code for the domain and percent encoding for the rest of the URL.