This is the Domain-String, Firefox attestation mode checker, not the W3C U2F mode.

To use this to test Web Authentication support in Firefox, do the following:

  1. Open the Firefox advanced preferences in about:config.
  2. Search for "webauth"
  3. Enable (value=True) these two:
    • security.webauth.webauthn
    • security.webauth.webauthn_enable_softtoken
  4. Reload this page and click buttons!




Relying Party ID to use. "" and "" should be the only valid options.