Hi, I believe the request comes from SiriusXM (and is just sent via Firefox). A security key is one of the methods to prove your identity (along with a password). That kind of requests are processed by Windows. In Firefox, you can protect your saved passwords in a similar way (see [[Secure Firefox passwords with device sign-in]]). However, in your case the request comes directly from a website, which suggests that it's specific to this website. It's not about any kind of general key, it should be something you have set for that particular website. In case you haven't, try to look for another login option.