diff --git a/dom/base/nsDocument.cpp b/dom/base/nsDocument.cpp
index d9c842fb92a9..0f1592c028a4 100644
--- a/dom/base/nsDocument.cpp
+++ b/dom/base/nsDocument.cpp
@@ -3716,8 +3716,8 @@ nsIDocument::ShouldThrottleFrameRequests()
     return false;
   }
 
-  if (!mIsShowing) {
-    // We're not showing (probably in a background tab or the bf cache).
+  if (Hidden()) {
+    // We're not visible (probably in a background tab or the bf cache).
     return true;
   }