The weakness involves the way these browsers display certain characters in the address bar. Until Google released version 58 in the past 24 hours, for instance, Chrome displayed https://www.xn--80ak6aa92e.com/ as https://www.apple.com. The latest versions of Firefox and Opera by default continue to present the same misleading address.

Source: Chrome, Firefox, and Opera users beware: This isn’t the apple.com you want | Ars Technica