Edge or Chrome needed with OAuth2

In this How do I update an existing Microsoft Hotmail or Outlook.com account to use OAuth 2.0?

With only Firefox installed, I end up getting a message showing:

It works for me with Firefox 102.2.1.

@cketti I’m also running 102.2.1, but don’t have either Chrome or Edge installed.

Do you have one of those installed? If not, I guess it’s my account settings somehow. Thanks for verifying.

Edit: Never mind, my bad. o365 not supported yet. Sorry for the hassle