1 files changed, 7 insertions, 4 deletions
diff --git a/netwerk/protocol/http/HttpBaseChannel.cpp b/netwerk/protocol/http/HttpBaseChannel.cpp
index 03123ceb0..21b661c2b 100644
--- a/netwerk/protocol/http/HttpBaseChannel.cpp
+++ b/netwerk/protocol/http/HttpBaseChannel.cpp
@@ -3676,14 +3676,17 @@ HttpBaseChannel::GetPerformance()
     return nullptr;
   }
 
-  // We only add to the document's performance object if it has the same
-  // principal as the one triggering the load. This is to prevent navigations
-  // triggered _by_ the iframe from showing up in the parent document's
-  // performance entries if they have different origins.
   if (!mLoadInfo->TriggeringPrincipal()->Equals(loadingDocument->NodePrincipal())) {
     return nullptr;
   }
 
+  if (mLoadInfo->GetExternalContentPolicyType() == nsIContentPolicy::TYPE_SUBDOCUMENT &&
+      !mLoadInfo->GetIsFromProcessingFrameAttributes()) {
+    // We only report loads caused by processing the attributes of the
+    // browsing context container.
+    return nullptr;
+  }
+
   nsCOMPtr<nsPIDOMWindowInner> innerWindow = loadingDocument->GetInnerWindow();
   if (!innerWindow) {
     return nullptr;