Your friend is sending you a file with Firefox Send, a service that allows you to share files with a safe, private, and encrypted link that automatically expires to ensure your stuff does not remain online forever.
El to collaciu unvióte un ficheru usando Firefox Send, un serviciu que te permite compartir ficheros con un enllaz seguru, priváu y cifráu que caduca automáticamente p'asegurar que les to coses nun queden siempres na rede.