URL: https://www.onlinebanking.natwest.com/login

Browser / Version: Firefox 147.0
Operating System: Mac OS X 10.15
Tested Another Browser: Yes Chrome

Problem type: Site is not usable
Description: Unable to type
Steps to Reproduce:
It's an input validation problem. There are day, month and year fields for date of birth, and the page won't accept reasonable entries under Firefox. Works with Chrome.

View the screenshot

From webcompat.com with ❤️