Can't even open relay.firefox.com to sign in...
I've already in the wait-list, even I've got invitation from Mozilla...
But I just can't open relay.firefox.com in China.

I love using my custom domain to make up an alias anytime someone asks me for an alias "in real life"!

НЕ РАБОТАЕТ! Требует инвайт!!! И где его взять?!

I can't use it. It's installed in my browser, but when I sign in, it tells me I must visit the invite email first. I have no invite e-mail and I can't find a way to generate one. Completely frustrated!!!

I got the invitation but whenever I go on the relay site it tells me that I need to accept the invitation email - though I accidentally deleted it a while ago. Now I can't access the addon, nor add myself to the waiting list. :(

Edit 1: No way to respond to the dev response below, so adding it here.

Unfortunately I got the referral from a forum, and there's no way to recall where I received it from.

I don't know if the alias is completely randomly generated, but one great feature would be a partially customizable one like customAlias.generatedAlias@domain. Then it would be possible to identify the leaking site when starting receiving spam.

I would love to try this...please.

The idea by itself sounds amazing, could i get an invite?

Please send the invite.

Ready to use this extension. I've been a dedicated FF user since v.1, and a Netscape user from the beginning. Loyalty should be rewarded. :-) Slip me an invite, please.

i can't use this add-on from Cuba because google forbids it use, i always got next message: 403. That’s an error.

Your client does not have permission to get URL / from this server. That’s all we know.

i hope this change in future because i love firefox

How can I get an invitation ?

Good idea, but why does it needs access to all website data ? Isn't it overkill to just generate an e-mail address to fill-in a field ?
There is an existing extension which does exactly the job, does not ask for unneeded permissons, and does not link the alias to our real address at all: please check Bloody Vikings! ... Way more privacy oriented !!

Please invite me.

Need an invite to get it working? Would be nice to get an ios version pushed. :D

This add-on is a great idea once its out of invitation only beta mode.

la idea por si sola es extraordinaria

Does not function. Sign in with Firefox account always brings me back to Sign in page.

Me parece una magnífica herramienta para mejorar el funcionamiento del navegador y añade mucho valor al mismo. Por favor, me gustaría recibir una invitación para instalarlo y probarlo. Gracias.