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URL: https://login.microsoft.com/common/fido/get?uiflavor=Web

Browser / Version: Firefox 138.0
Operating System: Windows 10
Tested Another Browser: Yes Edge

Problem type: Site is not usable
Description: Unable to login
Steps to Reproduce:
When attempting to log in to a Microsoft Entra account with either Windows Hello credentials or a FIDO2 security key, the Entra authN flow does not appear to be able to properly activate the security key UX provided by Windows.

When I select "Face, fingerprint, PIN or security key" as a way to log in, I am taken to a screen that says "Something went wrong when trying to sign in with a passkey. Please try again.".

When I try the same flow with Edge, after clicking on "Face, fingerprint, PIN or security key", I get UX from Windows asking me to pick the security key I want to use. I am able to use both my Windows Hello login and a FIDO2 security key.

In Firefox settings, I have enabled "Allow Windows single sign-on for Microsoft, work, and school accounts"

I already have a passkey for this account in Windows settings.

View the screenshot Screenshot
Browser Configuration
  • gfx.webrender.software: false
  • blockList: basic
  • channel: release
  • defaultUserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:138.0) Gecko/20100101 Firefox/138.0
  • hasTouchScreen: false
  • frameworks: {'fastclick': False, 'mobify': False, 'marfeel': False}
  • mixed active content blocked: false
  • mixed passive content blocked: false
  • tracking content blocked: false
  • btp has purged site: false

View console log messages

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Closed: Moved
#156686

login.microsoft.com - Unable to login

Opened: 2025-05-14
Reporter: chwarr
Comments: 4
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