diff --git a/files/en-us/web/api/document/importnode/index.html b/files/en-us/web/api/document/importnode/index.html
index c93142be415b341..bb3d3d30a33385a 100644
--- a/files/en-us/web/api/document/importnode/index.html
+++ b/files/en-us/web/api/document/importnode/index.html
@@ -48,25 +48,6 @@ <h3 id="Parameters">Parameters</h3>
         <code><var>externalNode</var></code> is imported — the new node has no children.
       </li>
     </ul>
-
-    <div class="note">
-      <p><strong>Note:</strong> In the DOM4 specification, <code><var>deep</var></code>
-        was an optional argument with a default value of <code>true</code>.</p>
-
-      <p><strong>This default has changed in the latest spec!</strong> The new default
-        value is <strong><code>false</code></strong>.</p>
-
-      <p><strong>Best Practice:</strong> Though it's still an optional argument, you
-        should always provide the <code><var>deep</var></code> argument for backward
-        <em>and</em> forward compatibility.</p>
-
-      <ul>
-        <li>With Gecko 28.0 {{geckoRelease(28)}}, the console warns developers not to omit
-          the argument.</li>
-        <li>Starting with Gecko 29.0 {{geckoRelease(29)}}), a shallow clone is defaulted
-          instead of a deep clone.</li>
-      </ul>
-    </div>
   </dd>
 </dl>
 
diff --git a/files/en-us/web/api/node/clonenode/index.html b/files/en-us/web/api/node/clonenode/index.html
index 81fd39c21399ecd..92e10b8843c47d2 100644
--- a/files/en-us/web/api/node/clonenode/index.html
+++ b/files/en-us/web/api/node/clonenode/index.html
@@ -43,26 +43,6 @@ <h2 id="Syntax">Syntax</h2>
 
     <p><code><var>deep</var></code> has no effect on empty elements (such as
       the {{HTMLElement("img")}} and {{HTMLElement("input")}} elements).</p>
-
-    <div class="note">
-      <p><strong>Note:</strong> In the DOM4 specification (since Gecko 13.0
-        {{geckoRelease(13)}}), the optional <code><var>deep</var></code> argument defaults
-        to <code>true</code>. </p>
-
-      <p><strong>This behavior has been changed in the latest spec!</strong>
-        Although <code><var>deep</var></code> it still optional, it now defaults to
-        <code>false</code>.</p>
-
-      <p><strong>You should <em>always</em> provide an explicit value for backward and
-          forward compatibility.</strong></p>
-
-      <ul>
-        <li>With Gecko 28.0 {{geckoRelease(28)}}), the console warned developers not to
-          omit the argument.</li>
-        <li>Starting with Gecko 29.0 {{geckoRelease(29)}}), a shallow clone is defaulted
-          instead of a deep clone.</li>
-      </ul>
-    </div>
   </dd>
 </dl>