diff --git a/dom/webidl/Node.webidl b/dom/webidl/Node.webidl
index c9fb7e77e..bf2c1c4de 100644
--- a/dom/webidl/Node.webidl
+++ b/dom/webidl/Node.webidl
@@ -38,7 +38,7 @@ interface Node : EventTarget {
   readonly attribute boolean isConnected;
   [Pure]
   readonly attribute Document? ownerDocument;
-  [Pure]
+  [Pure, Pref="dom.getRootNode.enabled"]
   Node getRootNode(optional GetRootNodeOptions options);
   [Pure]
   readonly attribute Node? parentNode;
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index adede67dc..813f609e4 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -4749,6 +4749,8 @@ pref("dom.push.enabled", false);
 
 pref("dom.push.loglevel", "error");
 
+pref("dom.getRootNode.enabled", false);
+
 pref("dom.push.serverURL", "wss://push.services.mozilla.com/");
 pref("dom.push.userAgentID", "");