[m-p-3]

Hopefully better support for U2F devices is on the way at both the browser and website level.

I wish more websites offered the option to use it.

[ilikepi]

Presumably you are referring to WebAuthn[1]. I am optimistic that this will lead to better browser support, and consequently better website support. IIRC it's expected to reach Firefox stable in the May release. Hopefully the various sites that currently only support U2F in Chrone will move to this new standard.

[1]: https://www.w3.org/Webauthn