diff --git a/ext/bg/js/settings/popup-preview-frame.js b/ext/bg/js/settings/popup-preview-frame.js
index f65b119c..cabadced 100644
--- a/ext/bg/js/settings/popup-preview-frame.js
+++ b/ext/bg/js/settings/popup-preview-frame.js
@@ -48,7 +48,6 @@ class SettingsPopupPreview {
 
         // Overwrite frontend
         this.frontend = Frontend.create();
-        window.yomichan_frontend = this.frontend;
 
         this.frontend.setEnabled = function () {};
         this.frontend.searchClear = function () {};
diff --git a/ext/fg/js/frontend-initialize.js b/ext/fg/js/frontend-initialize.js
index 37a82faa..8ffdf528 100644
--- a/ext/fg/js/frontend-initialize.js
+++ b/ext/fg/js/frontend-initialize.js
@@ -17,4 +17,4 @@
  */
 
 
-window.yomichan_frontend = Frontend.create();
+Frontend.create();