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FIDO2 user verification on Linux

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I'm running Firefox 78.0.2 on Linux.

If I try to register my FIDO2 token with user verification enabled, I don't get a pop-up to fill in my token's pin. It does work with Chrome on Linux and with Firefox 78.0.2 on Windows. Chrome seems to use a browser-embedded input mask while Firefox on Windows calls some Windows API. I guess that this API call is the one not working properly on my Linux system (but Chrome has to be using one to access the token, too) or that the pop-up doesn't get drawn/shown e.g. due to me using i3 as a window manager.

Does anybody have an idea how I could go on from here?

All Replies (3)

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Make sure you are not blocking content.

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh).
Is the problem still there?


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Yes it still doesn't work.


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Hi Nesuma:

I believe this is a known bug:

  • bug 1619850 FIDO2 support in Firefox on Linux and MacOSX not working

which is a duplicate of:

  • Bug 1530370 (webauthn-ctap2) [meta] Support CTAP2 (FIDO2) Passwordless Web Authentication

I've asked developers to provide further clarification.



Modified by cor-el


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