diff --git a/3.3-Updater-Scripts.md b/3.3-Updater-Scripts.md
index 9f9dadd..2ae15f9 100644
--- a/3.3-Updater-Scripts.md
+++ b/3.3-Updater-Scripts.md
@@ -38,6 +38,7 @@ Optional Arguments:
 -c		 Create a diff file comparing old and new user.js
 -v		 Open the resulting user.js file
 -r		 Only download user.js to a temporary file and open it
+-e               Activate ESR related preferences
 
 Deprecated Arguments (they still work for now):