Wouldn't it be possible for companies to simply reject e-mail addresses that end with "@relay.firefox.com"?
EDIT: Ok, it is answered in the FAQ:
> Why won’t a site accept my Relay alias?
> Some sites may not accept an email address that includes a subdomain (i.e., the “relay” portion of @relay.firefox.com) and others have stopped accepting all addresses except those from Gmail, Hotmail, or Yahoo accounts. As Firefox Relay grows in popularity and issues more aliases, our service might be placed on a blocklist. If you are not able to use a Relay alias, please let us know.
anyone here knows if Firefox VPN income is still routed through Mozilla Corporation (the makers of Firefox) or if it goes directly to Mozilla Foundation and becomes useless for browser development?
(Because my main reason for using Firefox VPN would be to support browser development.)
EDIT: Ok, it is answered in the FAQ:
> Why won’t a site accept my Relay alias?
> Some sites may not accept an email address that includes a subdomain (i.e., the “relay” portion of @relay.firefox.com) and others have stopped accepting all addresses except those from Gmail, Hotmail, or Yahoo accounts. As Firefox Relay grows in popularity and issues more aliases, our service might be placed on a blocklist. If you are not able to use a Relay alias, please let us know.