diff --git a/htdocs/js/DragNDrop/dragndrop.js b/htdocs/js/DragNDrop/dragndrop.js
index d7e78b693f..e46faad6e7 100644
--- a/htdocs/js/DragNDrop/dragndrop.js
+++ b/htdocs/js/DragNDrop/dragndrop.js
@@ -182,7 +182,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/DropDown/dropdown.js b/htdocs/js/DropDown/dropdown.js
index c10d2b2ad5..170a96c837 100644
--- a/htdocs/js/DropDown/dropdown.js
+++ b/htdocs/js/DropDown/dropdown.js
@@ -57,7 +57,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/Essay/essay.js b/htdocs/js/Essay/essay.js
index 7f6f11df0c..3c7a747e7c 100644
--- a/htdocs/js/Essay/essay.js
+++ b/htdocs/js/Essay/essay.js
@@ -76,6 +76,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/Feedback/feedback.js b/htdocs/js/Feedback/feedback.js
index 98ddfee618..5328334ec2 100644
--- a/htdocs/js/Feedback/feedback.js
+++ b/htdocs/js/Feedback/feedback.js
@@ -91,7 +91,4 @@
 		});
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/ImageView/imageview.js b/htdocs/js/ImageView/imageview.js
index be6ee5b1f3..e039efd02d 100644
--- a/htdocs/js/ImageView/imageview.js
+++ b/htdocs/js/ImageView/imageview.js
@@ -330,7 +330,4 @@
 		});
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/MathQuill/mqeditor.js b/htdocs/js/MathQuill/mqeditor.js
index d6698a1e18..7a950370d0 100644
--- a/htdocs/js/MathQuill/mqeditor.js
+++ b/htdocs/js/MathQuill/mqeditor.js
@@ -599,7 +599,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/MathView/mathview.js b/htdocs/js/MathView/mathview.js
index 1952526154..92e3acb10a 100644
--- a/htdocs/js/MathView/mathview.js
+++ b/htdocs/js/MathView/mathview.js
@@ -431,7 +431,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/QuickMatrixEntry/quickmatrixentry.js b/htdocs/js/QuickMatrixEntry/quickmatrixentry.js
index beb784f4cc..e2bcd6305e 100644
--- a/htdocs/js/QuickMatrixEntry/quickmatrixentry.js
+++ b/htdocs/js/QuickMatrixEntry/quickmatrixentry.js
@@ -128,5 +128,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/RadioButtons/RadioButtons.js b/htdocs/js/RadioButtons/RadioButtons.js
index 48cd2f4d54..75698e6ee5 100644
--- a/htdocs/js/RadioButtons/RadioButtons.js
+++ b/htdocs/js/RadioButtons/RadioButtons.js
@@ -47,7 +47,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/RadioMultiAnswer/RadioMultiAnswer.js b/htdocs/js/RadioMultiAnswer/RadioMultiAnswer.js
index 1fe68e036f..e9db03099f 100644
--- a/htdocs/js/RadioMultiAnswer/RadioMultiAnswer.js
+++ b/htdocs/js/RadioMultiAnswer/RadioMultiAnswer.js
@@ -153,7 +153,4 @@
 		}
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();
diff --git a/htdocs/js/Scaffold/scaffold.js b/htdocs/js/Scaffold/scaffold.js
index 060c00747b..37a296f9aa 100644
--- a/htdocs/js/Scaffold/scaffold.js
+++ b/htdocs/js/Scaffold/scaffold.js
@@ -34,7 +34,4 @@
 		});
 	});
 	observer.observe(document.body, { childList: true, subtree: true });
-
-	// Stop the mutation observer when the window is closed.
-	window.addEventListener('unload', () => observer.disconnect());
 })();