Firefox is unfortunately a behind on support for this technology. I believe at least one password manager (Dashlane) has shipped a web extension that would poly

Firefox is unfortunately a behind on support for this technology. I believe at least one password manager (Dashlane) has shipped a web extension that would polyfill the missing bits on Firefox. Unfortunately, passkeys.io as a demo falls back to a legacy "no passkey support" behavior for Firefox, without making it clear (as a demo site) that this is happening.