For Debian-based OS :
Jessie-backports : https://packages.debian.org/jessie-back ... ync-daemon
Stretch : https://packages.debian.org/stretch/all ... n/download
Buster : https://packages.debian.org/buster/all/ ... n/download
Github : https://github.com/graysky2/profile-sync-daemon
Profile-sync-daemon (psd) is a tiny pseudo-daemon designed to manage your browser's profile in tmpfs and to periodically sync it back to your physical disc (HDD/SSD). This is accomplished via a symlinking step and an innovative use of rsync to maintain back-up and synchronization between the two. One of the major design goals of psd is a completely transparent user experience.
Popular and less popular browsers are supported, such as Firefox, Palemoon, Opera, Chrome, Chromium, Vivaldi, etc.
Here is a quick link to download a .deb file for Stretch : http://ftp.us.debian.org/debian/pool/ma ... -1_all.deb
For Ubuntu-based OS :
Since June of 2016, Profile-sync-daemon is in the official repos for users of Yakkety+ (16.10+)