Firefox Relay email aliases hide your real email address and forward emails to your inbox. You can now only receive the emails you wish to receive in your inbox. Register with Firefox to get started. To protect your email inbox and identity, you can use Share Relay email aliases to replace your real email address. Relay icons will appear on sites that ask for your email address as you browse the internet. Register to the Relay dashboard and keep track of all the aliases that you have created. Relay will forward all messages to your email address. You can block spam and unwelcome messages from an alias or delete it right from your dashboard.