diff --git a/2.2-Backup.md b/2.2-Backup.md
index 94ff445..b560b82 100644
--- a/2.2-Backup.md
+++ b/2.2-Backup.md
@@ -4,7 +4,7 @@
 
 ---
 
-The easiest, and complete, way to backup is to copy your entire profile directory when Firefox is closed. Just backing up `prefs.js` file is not enough, and not recommended by this wiki
+The easiest, and complete, way to backup is to copy your entire profile directory when Firefox is closed. Just backing up `prefs.js` file is not enough, and not recommended by this wiki <sup>1</sup>
 
 To find your profile directory, go to `about:support` and about the 10th item listed is `Profile Folder` with an `Open Folder` button
 
@@ -12,6 +12,8 @@ When copying your profile directory, make sure Firefox is closed. Rename your co
 
 Be aware, that this is your entire profile. So rolling back will not keep any new cookies, saved passwords, bookmarks, extension changes and the like
 
+<sup>1</sup> `prefs.js` is a runtime file that includes more than just your pref changes, and backing up `prefs.js` does not cover all the things a `user.js` can alter
+
 ---
 
 🟩 Next: [Overrides](https://github.com/arkenfox/user.js/wiki/3.1-Overrides)
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