script to save/restore ff sessions

ff-backup-session-recovery.sh

#!/bin/bash

#ssb=$(ls -d ~/.mozilla/firefox/*.default-esr68/sessionstore-backups)
ssb=$(find ~/.mozilla/firefox -regex '.*.default-[0-9]+')/sessionstore-backups

err() {
    echo $* >&2
    exit 2
}

usage() {
    cat >&2 <<EOF
Store/list/restore firefox session backups

Usage: $0 [-hv] [-s ssb] [store]|restore ts|list
       -h       this message
       -v       verbose operation
       -s ssb   sessionstore-backups folder

Without arguments, default action is store.

Specify restore ts to restore the session backup, e.g.:

        $0 restore 20190823-044501

Given, recovery.jsonlz4.20190823-044501 exists, and is readable.

Usually, the sessionstore-backups folder is detected automatically.
EOF
    echo 1
}

while getopts hvs: par ; do
    case $par in
    h) usage;;
    v) set -o xtrace;;
    s) ssb="$OPTARG";;
    esac
done
shift $(($OPTIND - 1))

# check ssb validity
[ $(echo "$ssb" | wc -w) -eq 1 -a -d "$ssb" ] || err "$ssb: invalid sessionstore-backups folder"

action=store
[ -n "$1" ] && { action=$1; shift; }
case $action in
    store)
        ssr=$ssb/recovery.jsonlz4
        ts=$(date +%Y%m%d-%H%M%S)
        [ -f "$ssr" ] && cp -a "$ssr" "$ssr.$ts" || err "$ssr not found"
        ;;
    list)
        pushd $ssb &>/dev/null
        ls -ltr recovery.jsonlz4*
        popd &>/dev/null
        ;;
    restore)
        ssr=$ssb/recovery.jsonlz4
	# remove recovery.jsonlz4. from ts argument
        ts=${1##recovery.jsonlz4.}
        [ -n "$ts" ] || err "no timestamp specified, check with list"
        [ -f "$ssr~" ] && mv "$ssr~" "$ssr~~"
        [ -f "$ssr" ] && mv "$ssr" "$ssr~"
        [ -f "$ssr.$ts" ] && cp -a "$ssr.$ts" "$ssr" || err "$ssr.$ts not found"
	;;
    *)
	err "unknown command: $action"
        ;;
esac

exit 0