I just installed a fresh FreeBSD but when I try to install emacs with pkg install emacs, I've the following error.
ld-elf.so.1: Shared object "libssl.so.9" not found, required by "pkg". The only thing I've done is portsnap fetch extract
Aside ls, cd and man, it's the second command on this system.
Any idea?
portsnapis for ports, not packages. You do not need to do that. As always, refer to the most excellent FreeBSD Handbook for information.