Please create an alias for torbrowser@torproject.org
I've tried to send a signature for the new Tor Browser signing key and it bounced back. The email address associated with this identity torbrowser@torproject.org doesn't exist.
I believe an alias should be created.
(Probably this ticket should be reassigned to sysadmin once a destination has been agreed upon.)
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information