Experiencing the same issues as a lot of other folks, I joined the waitlist over a month ago, finally got an invite email to install today and start using it, yet when I follow that link it prompts me to sign in and then asks me to join the waitlist... the one that I was already on. Makes no sense, very frustrating. Worth mentioning I'm in the USA, since it's only available here right now for beta. What gives, Firefox? :(

Edit: I figured it out so I figured I would update my review. Make sure you are logging in with the email address they sent the invite to. Apparently I use different emails for Firefox overall, and what I signed up for Relay waitlist. Don't even remember having a Firefox account for that email but, there you go. Hence the confusion. I think maybe the email could just give you a friendly reminder to do this, to avoid user error like mine (and maybe a few other folks).