Adding waterfox to profile-sync-daemon

It is not "supported" by default, but it works if you do the following.

# stop service
systemctl --user stop psd
systemctl --user disable psd


# add profile for waterfox

-------------- create a file called waterfox with this content
if [[ -d $HOME/.waterfox ]]; then
    profileArr=( $(grep '[P,p]'ath= $HOME/.waterfox/profiles.ini |
    sed 's/[P,p]ath=//') )
    index=0
    PSNAME="$browser"
    for profileItem in ${profileArr[@]}; do
        if [[ $(echo $profileItem | cut -c1) = "/" ]]; then
            # path is not relative
            DIRArr[index]="$profileItem"
        else
            # we need to append the default path to give a
            # fully qualified path
            DIRArr[index]="$HOME/.waterfox/$profileItem"
        fi
        index=$index+1
    done
fi

check_suffix=1
------------------

drop your profile in /usr/share/psd/browsers/


# verify user settings

~/.config/psd/psd.conf

you should have something similar to 

BROWSERS="waterfox google-chrome"


# enable service

systemctl --user start psd
systemctl --user enable psd



# now you should see waterfox within the profiles covered

$ psd preview
Profile-sync-daemon v6.31 on Debian GNU/Linux 10 (buster)

 Systemd service is currently active.
 Systemd resync-timer is currently active.
 Overlayfs v23 is currently active.

Psd will manage the following per /home/USER/.config/psd/.psd.conf:

 browser/psname:  waterfox/waterfox
 owner/group id:  USER/<blah>
 sync target:     /home/USER/.waterfox/6jebqofr.default
 tmpfs dir:       /run/user/<blah>/USER-waterfox-6jebqofr.default
 profile size:    709M
 overlayfs size:  0
 recovery dirs:   1 <- delete with the c option
  dir path/size:  /home/USER/.waterfox/<blah>.default-backup-crashrecovery-20230624_224855 (692M)

 browser/psname:  google-chrome/chrome
 owner/group id:  USER/<blah>
 sync target:     /home/USER/.config/google-chrome
 tmpfs dir:       /run/user/<blah>/USER-google-chrome
 profile size:    588M
 overlayfs size:  0
 recovery dirs:   1 <- delete with the c option
  dir path/size:  /home/USER/.config/google-chrome-backup-crashrecovery-20230624_224900 (750M)