URL: https://beta.maps.apple.com

Browser / Version: Firefox 128.0
Operating System: Windows 10
Tested Another Browser: Yes Chrome

Problem type: Site is not usable
Description: Browser unsupported
Steps to Reproduce:
The page says "Your browser is unsupported." and provides a link which says "See supported browsers" to https://support.apple.com/en-us/120585 which lists only Edge and Chrome as supported on Windows.

View the screenshot

From webcompat.com with ❤️