Syncthing

# Add the release PGP keys:
curl -s https://syncthing.net/release-key.txt | sudo apt-key add -
 
# Add the "release" channel to your APT sources:
echo "deb https://apt.syncthing.net/ syncthing release" | sudo tee /etc/apt/sources.list.d/syncthing.list
sudo apt install apt-transport-https
sudo apt-get update
sudo apt install syncthing

settings are in ~/.config/syncthing

sudo systemctl enable syncthing@scipio.service
sudo systemctl start syncthing@scipio.service

open browser at http://localhost:8384/

• http://ablebaker.blogspot.it/2011/03/sync-firefox-bookmarks-using-dropbox.html