Firefox displays error when trying to register a new FIDO U2F token...

Firefox displays error when trying to register a new FIDO U2F token (Yubikey) "Register FIDO U2F An unspecified error occurred"

  • Problem: Cannot register Fast Identity Online (FIDO) Universal 2nd Factor (U2F) device, such as Yubikey, when using Firefox browser.
  • Affects: Firefox browser v78.0.1 or earlier (as at time of writing).
  • Cause: A library is not supported
  • Solution: Use Chrome or another browser to register the device.

A future version of Magnus Box will improve compatibility with Firefox

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