diff --git a/netwerk/protocol/http/HttpBaseChannel.cpp b/netwerk/protocol/http/HttpBaseChannel.cpp
index 7fec5c8a709c..9c3cff1b466e 100644
--- a/netwerk/protocol/http/HttpBaseChannel.cpp
+++ b/netwerk/protocol/http/HttpBaseChannel.cpp
@@ -2901,6 +2901,36 @@ HttpBaseChannel::SetupReplacementChannel(nsIURI       *newURI,
   if (mLoadInfo) {
     nsCOMPtr<nsILoadInfo> newLoadInfo =
       static_cast<mozilla::LoadInfo*>(mLoadInfo.get())->Clone();
+
+    // re-compute the origin attributes of the loadInfo if it's top-level load.
+    bool isTopLevelDoc =
+      newLoadInfo->GetExternalContentPolicyType() == nsIContentPolicy::TYPE_DOCUMENT;
+
+    if (isTopLevelDoc) {
+      nsCOMPtr<nsILoadContext> loadContext;
+      NS_QueryNotificationCallbacks(this, loadContext);
+      DocShellOriginAttributes docShellAttrs;
+      if (loadContext) {
+        loadContext->GetOriginAttributes(docShellAttrs);
+      }
+      MOZ_ASSERT(docShellAttrs.mFirstPartyDomain.IsEmpty(),
+                 "top-level docshell shouldn't have firstPartyDomain attribute.");
+
+      NeckoOriginAttributes attrs = newLoadInfo->GetOriginAttributes();
+
+      MOZ_ASSERT(docShellAttrs.mAppId == attrs.mAppId,
+                "docshell and necko should have the same appId attribute.");
+      MOZ_ASSERT(docShellAttrs.mUserContextId == attrs.mUserContextId,
+                "docshell and necko should have the same userContextId attribute.");
+      MOZ_ASSERT(docShellAttrs.mInIsolatedMozBrowser == attrs.mInIsolatedMozBrowser,
+                "docshell and necko should have the same inIsolatedMozBrowser attribute.");
+      MOZ_ASSERT(docShellAttrs.mPrivateBrowsingId == attrs.mPrivateBrowsingId,
+                 "docshell and necko should have the same privateBrowsingId attribute.");
+
+      attrs.InheritFromDocShellToNecko(docShellAttrs, true, newURI);
+      newLoadInfo->SetOriginAttributes(attrs);
+    }
+
     bool isInternalRedirect =
       (redirectFlags & (nsIChannelEventSink::REDIRECT_INTERNAL |
                         nsIChannelEventSink::REDIRECT_STS_UPGRADE));