diff --git a/browser/devtools/debugger/debugger-panes.js b/browser/devtools/debugger/debugger-panes.js
index 5be8ccfa5640..1af08b2c9db4 100644
--- a/browser/devtools/debugger/debugger-panes.js
+++ b/browser/devtools/debugger/debugger-panes.js
@@ -2377,7 +2377,7 @@ LineResults.prototype = {
         firstMatch = firstMatch || lineChunkNode;
       }
       if (lineLength >= GLOBAL_SEARCH_LINE_MAX_LENGTH) {
-        lineContentsNode.appendChild(this._ellipsis.cloneNode());
+        lineContentsNode.appendChild(this._ellipsis.cloneNode(true));
         break;
       }
     }
diff --git a/content/html/content/test/forms/test_restore_form_elements.html b/content/html/content/test/forms/test_restore_form_elements.html
index 786887ebf5b7..d92c5c7e9ad6 100644
--- a/content/html/content/test/forms/test_restore_form_elements.html
+++ b/content/html/content/test/forms/test_restore_form_elements.html
@@ -104,7 +104,7 @@ function shuffle() {
   form2.insertBefore(inputD, form2.firstChild)
 
   // Clone an existing input
-  var inputE2 = framedoc.getElementById("e").cloneNode();
+  var inputE2 = framedoc.getElementById("e").cloneNode(true);
   inputE2.setAttribute("id","e2");
   testdiv.appendChild(inputE2);
 }