Enabling webauth on Mullvad browser

Questions
1

Does enabling webauth to use my yubikey to login to sites when using the browser make my fingerprint so unique as to defeat the purpose of using the browser?

2

https://github.com/mullvad/mullvad-browser/issues/53#issuecomment-1725695207

Just to make this entirely clear: Enabling security.webauth.webauthn manually is indeed fingerprintable:
If it’s enabled navigator.credentials (and some classes on window) will be set which are otherwise undefined.

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3

It is fingerprintable, yes. This is one of the reasons we recommend using a browser like Firefox for trusted websites which you log in to, and Mullvad Browser for other browsing.

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