diff --git a/2.1-User.js.md b/2.1-User.js.md
index 7db9907..7e20d8f 100644
--- a/2.1-User.js.md
+++ b/2.1-User.js.md
@@ -4,7 +4,7 @@
 
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-Prefs are settings that control Firefox's behavior.  Some can be set from `☰ Settings` and all can be found in `about:config`, except for what are called `hidden preferences` which will only show when they are set by the user.
+Prefs are settings that control Firefox's behavior.  Some can be set from `☰ Settings` and all can be found in `about:config`, except for what are called `hidden preferences` which will only show when they are `modified` (i.e. set to any value by the user or browser - they have a trash can symbol for resetting)
 
 #### 🟪 WHERE DOES IT GO