diff --git a/scratchpad-scripts/arkenfox-clear-removed.js b/scratchpad-scripts/arkenfox-clear-removed.js
index 25da048..8ade622 100644
--- a/scratchpad-scripts/arkenfox-clear-removed.js
+++ b/scratchpad-scripts/arkenfox-clear-removed.js
@@ -1,7 +1,7 @@
 /***
  This will reset the preferences that have been removed completely from the arkenfox user.js.
 
- Last updated: 14-Sept-2020
+ Last updated: 2-Oct-2020
 
  For instructions see:
  https://github.com/arkenfox/user.js/wiki/3.1-Resetting-Inactive-Prefs-[Scripts]
@@ -223,6 +223,8 @@
     'browser.search.region',
     /* 79-beta */
     'browser.urlbar.usepreloadedtopurls.enabled',
+    /* 80 */
+    'dom.IntersectionObserver.enabled',
     /* reset parrot: check your open about:config after running the script */
     '_user.js.parrot'
   ]