--- a/browser/base/content/test/performance/browser_windowopen_reflows.js
+++ b/browser/base/content/test/performance/browser_windowopen_reflows.js
@@ -19,32 +19,32 @@ const EXPECTED_REFLOWS = [
 ];
 
 if (Services.appinfo.OS == "WINNT") {
   EXPECTED_REFLOWS.push(
     {
       stack: [
         "verticalMargins@chrome://browser/content/browser-tabsintitlebar.js",
         "_update@chrome://browser/content/browser-tabsintitlebar.js",
-        "init@chrome://browser/content/browser-tabsintitlebar.js",
-        "handleEvent@chrome://browser/content/tabbrowser.xml",
+        "onDOMContentLoaded@chrome://browser/content/browser-tabsintitlebar.js",
+        "onDOMContentLoaded@chrome://browser/content/browser.js",
       ],
       maxCount: 2, // This number should only ever go down - never up.
     },
   );
 }
 
 if (Services.appinfo.OS == "WINNT" || Services.appinfo.OS == "Darwin") {
   EXPECTED_REFLOWS.push(
     {
       stack: [
         "rect@chrome://browser/content/browser-tabsintitlebar.js",
         "_update@chrome://browser/content/browser-tabsintitlebar.js",
-        "init@chrome://browser/content/browser-tabsintitlebar.js",
-        "handleEvent@chrome://browser/content/tabbrowser.xml",
+        "onDOMContentLoaded@chrome://browser/content/browser-tabsintitlebar.js",
+        "onDOMContentLoaded@chrome://browser/content/browser.js",
       ],
       // These numbers should only ever go down - never up.
       maxCount: Services.appinfo.OS == "WINNT" ? 5 : 4,
     },
   );
 }
 
 /*