diff --git a/scripts/99_deploy.sh b/scripts/99_deploy.sh
index bc17c43..edbafa3 100755
--- a/scripts/99_deploy.sh
+++ b/scripts/99_deploy.sh
@@ -320,6 +320,8 @@ if [ ${operation} == "dots" ] ; then
         file_name=user.js
         file_path=${ffpd}
         deploy_file "${dots_trg}/firefox/${file_name}" "${file_path}/${file_name}"
+        # https://stackoverflow.com/questions/525592/find-and-replace-inside-a-text-file-from-a-bash-command
+        # https://askubuntu.com/questions/76808/how-do-i-use-variables-in-a-sed-command
         sed -i -e "s/{HOSTNAME}/${HOSTNAME}/g" "${file_path}/${file_name}"
 
         file_name=userChrome.css