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News > Activating FIDO U2F on Firefox Quantum

Date: 05/04/2018

Activating FIDO U2F on Firefox Quantum

Firefox now allows native support of FIDO Universal 2nd Factor (U2F) devices, which is great. The only down side is that it is not set by default, and you will need to go into the advanced settings to activate it.

So why isn't it active by default? Mozilla are looking to have FIDO 2, the next generation of U2F, as the default security service. Until then though, you can still use the more widely supported U2F devices.

So how do you enable FIDO U2F on Firefox Quantum?

The process of turning FIDO U2F is relatively simple, and is just three simple steps to follow:

  1. In the browser bar type about:config. You may get a warning that you are activating advanced settings. Proceed if you agree.
  2. In the search field type u2f
  3. Double-click on the labelled security.webauth.u2f to change the value from false to true

So now I can use Firefox with FIDO U2F enabled web-sites?

Yes, and no. Integrators that have used FIDO U2F v1.1 JS API  to develop a web app can be supported on Firefox. However, some implementations can vary from the specifications, and may not implement all functions, which is the case with Firefox. Some website developers will have coded around these limitations, and some may not have. So if you are having issues when using Mozilla and your website make sure you raise this so that the website and / or Mozilla refine their FIDO U2F support.

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