diff --git a/docshell/base/nsDocShell.cpp b/docshell/base/nsDocShell.cpp
index 39a39d9178..5c002357fe 100644
--- a/docshell/base/nsDocShell.cpp
+++ b/docshell/base/nsDocShell.cpp
@@ -10402,10 +10402,13 @@ nsDocShell::InternalLoad(nsIURI* aURI,
        * call OnNewURI() so that, this traversal will be
        * recorded in session and global history.
        */
-      nsCOMPtr<nsIPrincipal> triggeringPrincipal, principalToInherit;
+      nsCOMPtr<nsIPrincipal> newURITriggeringPrincipal, newURIPrincipalToInherit;
       if (mOSHE) {
-        mOSHE->GetTriggeringPrincipal(getter_AddRefs(triggeringPrincipal));
-        mOSHE->GetPrincipalToInherit(getter_AddRefs(principalToInherit));
+        mOSHE->GetTriggeringPrincipal(getter_AddRefs(newURITriggeringPrincipal));
+        mOSHE->GetPrincipalToInherit(getter_AddRefs(newURIPrincipalToInherit));
+      } else {
+        newURITriggeringPrincipal = aTriggeringPrincipal;
+        newURIPrincipalToInherit = doc->NodePrincipal();
       }
       // Pass true for aCloneSHChildren, since we're not
       // changing documents here, so all of our subframes are
@@ -10415,7 +10418,7 @@ nsDocShell::InternalLoad(nsIURI* aURI,
       // flag on firing onLocationChange(...).
       // Anyway, aCloneSHChildren param is simply reflecting
       // doShortCircuitedLoad in this scope.
-      OnNewURI(aURI, nullptr, triggeringPrincipal, principalToInherit,
+      OnNewURI(aURI, nullptr, newURITriggeringPrincipal, newURIPrincipalToInherit,
                mLoadType, true, true, true);
 
       nsCOMPtr<nsIInputStream> postData;
diff --git a/dom/base/nsGlobalWindow.cpp b/dom/base/nsGlobalWindow.cpp
index 738703ef1c..4ffccde9d3 100644
--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -2521,8 +2521,13 @@ nsGlobalWindow::WouldReuseInnerWindow(nsIDocument* aNewDocument)
     return false;
   }
 
-  NS_ASSERTION(NS_IsAboutBlank(mDoc->GetDocumentURI()),
-               "How'd this happen?");
+#ifdef DEBUG
+{
+  nsCOMPtr<nsIURI> uri;
+  mDoc->GetDocumentURI()->CloneIgnoringRef(getter_AddRefs(uri));
+  NS_ASSERTION(NS_IsAboutBlank(uri), "How'd this happen?");
+}
+#endif
 
   // Great, we're the original document, check for one of the other
   // conditions.