3 files changed, 7 insertions, 0 deletions
diff --git a/dom/webidl/Document.webidl b/dom/webidl/Document.webidl
index 0b8c278fe..904b1fb77 100644
--- a/dom/webidl/Document.webidl
+++ b/dom/webidl/Document.webidl
@@ -277,8 +277,11 @@ partial interface Document {
 
 // https://w3c.github.io/page-visibility/#extensions-to-the-document-interface
 partial interface Document {
+  [Pref="dom.visibilityAPI.enabled"]
   readonly attribute boolean hidden;
+  [Pref="dom.visibilityAPI.enabled"]
   readonly attribute VisibilityState visibilityState;
+  [Pref="dom.visibilityAPI.enabled"]
            attribute EventHandler onvisibilitychange;
 };
 
diff --git a/dom/webidl/Element.webidl b/dom/webidl/Element.webidl
index ca5f1b35c..97eb4ffe0 100644
--- a/dom/webidl/Element.webidl
+++ b/dom/webidl/Element.webidl
@@ -41,6 +41,8 @@ interface Element : Node {
   [Pure]
   DOMString? getAttributeNS(DOMString? namespace, DOMString localName);
   [Throws]
+  boolean toggleAttribute(DOMString name, optional boolean force);
+  [Throws]
   void setAttribute(DOMString name, DOMString value);
   [Throws]
   void setAttributeNS(DOMString? namespace, DOMString name, DOMString value);
diff --git a/dom/webidl/Event.webidl b/dom/webidl/Event.webidl
index f87dc195c..70a0ef513 100644
--- a/dom/webidl/Event.webidl
+++ b/dom/webidl/Event.webidl
@@ -17,6 +17,8 @@ interface Event {
   readonly attribute DOMString type;
   [Pure]
   readonly attribute EventTarget? target;
+  [Pure, BinaryName="target"]
+  readonly attribute EventTarget? srcElement;
   [Pure]
   readonly attribute EventTarget? currentTarget;