diff --git a/README.md b/README.md
index 6d26109..865ec4c 100644
--- a/README.md
+++ b/README.md
@@ -22,3 +22,8 @@ convert infile.md in the current folder to a pdf file (outfile.pdf) with code bl
 ### flatten.sh
 move all the files in $1 subdirectories to $1.   
 **Careful**, this operation is irreversible and manually moving back all the files to where they were supposed to be will be a pain if you flatten your home folder.
+
+### backupfirefox.sh
+script to backup firefox config directory and restore the latest backup   
+adapt the hostnames and paths to what you need, not made to be easily configured with environment variables.  
+**Careful**, firefox config folder includes all your profiles, including their cookies and localstorage (access tokens of your accounts can be there). 
diff --git a/backupfirefox.sh b/backupfirefox.sh
new file mode 100755
index 0000000..8c5b38e
--- /dev/null
+++ b/backupfirefox.sh
@@ -0,0 +1,23 @@
+#!/bin/bash
+DATE=$(date --iso-8601=hours)
+if [[ "$1" = "--restore" ]] then
+     FILENAME="/home/fire/Downloads/$DATE.tar.gz"
+     tar -czf $FILENAME -C /home/fire/.mozilla ./firefox
+     echo "backed up current firefox data to $FILENAME"
+     case $HOSTNAME in
+          (HentaiStash) RESTORE="/home/storage/storage/code/browser/firefox/"$(ls -t /home/storage/storage/code/browser/firefox/ | head -n1);;
+          (ArchLaptop) RESTORE="/home/fire/Nextcloud/storage/code/browser/firefox/"$(ls -t /home/fire/Nextcloud/storage/code/browser/firefox/ | head -n1);;
+          (*) echo "include device in script"; exit 1;;
+     esac
+     echo "restoring $RESTORE"
+     rm -rf /home/fire/.mozilla/firefox
+     tar -xzf $RESTORE -C /home/fire/.mozilla
+else
+     case $HOSTNAME in
+          (HentaiStash) FILENAME="/home/storage/storage/code/browser/firefox/$DATE.tar.gz";;
+          (ArchLaptop) FILENAME="/home/fire/Nextcloud/storage/code/browser/firefox/$DATE.tar.gz";;
+          (*) echo "include device in script"; exit 1;;
+     esac
+     echo "backing up current firefox data"
+     tar -czf $FILENAME -C /home/fire/.mozilla ./firefox
+fi