Sorry to be so bitter about this, but at this point, "Amazon botches UX design for feature X" isn't news – "Amazon delivers useable UX" would be.<p>Passkeys are complicated enough, but even as somebody having spent hours looking into WebAuthN and setting up my own smartcard-based NFC authenticator, it took me a while to understand what's going on with Amazon's implementation.<p>- "If you want to add a passkey, use a different cloud service account (example: Apple ID or Google account). Each cloud service account can only have one passkey for Amazon." is what I see in Firefox, for example – what on earth does that mean? Firefox doesn't synchronize passkeys with either of these accounts. The issue is that they don't support platform authenticators on macOS. That error message does not make sense!<p>- Ok, I get it now, so Firefox does not support passkeys, hence the button is greyed out, fair enough. But, wait... 1Password does provide passkey support through their Firefox extension. It works on every other WebAuthN/passkey-supporting site. And 1Password's passkeys do work on Amazon using Chrome! Do they just sniff the user agent here and grey out the button on Firefox? What's going on?<p>- The only option to manage passkeys in my Amazon account is to... <i>delete ALL of them</i>. I guess adding a list of passkeys and the dates they were added, like almost every other service I know supports, was just too much to ask from Amazon.<p>- "If you didn't set up this passkey, please go to your account settings to delete the passkey.". – Oh, right, let me quickly go through the literal <i>dozens of options</i> in my Amazon account page. I get that Amazon does not want to train users to click links from emails (although that ship has arguably sailed, which is why we are getting WebAuthN in the first place: It's phishing-resistant!). But Is it too much to ask to simply reference the path there, i.e. "Your Account -> Login & security -> Passkey" in that message?<p>On the other hand, this is completely in line with my user experience on any Amazon site or product. I wonder if Amazon is even aware of the mere <i>concept</i> of UI/UX design as something other than a half-day task any backend engineer is just expected to do as part of the feature they're shipping.