I can't talk about Firefox Send, but in this case, AIUI, an account is required to generate a token to use with the VPN (proxy, really) provider. Otherwise, the

I can't talk about Firefox Send, but in this case, AIUI, an account is required to generate a token to use with the VPN (proxy, really) provider. Otherwise, the provider would just be providing an open proxy. Which could then happily be abused by spammers and whatnot. (Come to think of it, it's probably a similar reason for Firefox Send ; you don't want anonymous unlimited hosting)