1 files changed, 7 insertions, 0 deletions
diff --git a/components/script/dom/webidls/HTMLIFrameElement.webidl b/components/script/dom/webidls/HTMLIFrameElement.webidl
index 7768065545c..558cdfd8030 100644
--- a/components/script/dom/webidls/HTMLIFrameElement.webidl
+++ b/components/script/dom/webidls/HTMLIFrameElement.webidl
@@ -31,3 +31,10 @@ partial interface HTMLIFrameElement {
   //[TreatNullAs=EmptyString] attribute DOMString marginHeight;
   //[TreatNullAs=EmptyString] attribute DOMString marginWidth;
 };
+
+partial interface HTMLIFrameElement {
+  [ChromeOnly,SetterThrows]
+           attribute boolean mozbrowser;
+};
+
+HTMLIFrameElement implements BrowserElement;