Install CurlFtpFS with:
sudo apt-get install curlftpfs
Mount an FTP site with:
sudo curlftpfs -o user=myuser:mypass ftp://ftp.domain.tld ./mylocaldir
sudo ls ./mylocaldir
sudo fusermount -u ./mylocaldir
Or add it to the fstab:
mkdir /media/myftpsite && chown myuser:mysuer /media/myftpsite
vi /etc/fstab
Add the following line at the end of the file:
curlftpfs#ftp.domain.tld /media/myftpsite fuse rw,uid=1000,user,noauto 0 0
Then under the Places menu you should see your new mount available. Clicking on it should open Nautilus at /media/myftpsite with your FTP site viewable.