--- a/browser/base/content/test/performance/browser_windowopen_reflows.js
+++ b/browser/base/content/test/performance/browser_windowopen_reflows.js
@@ -51,17 +51,17 @@ if (Services.appinfo.OS == "Darwin") {
 }
 
 if (Services.appinfo.OS == "WINNT") {
   EXPECTED_REFLOWS.push(
     {
       stack: [
         "verticalMargins@chrome://browser/content/browser-tabsintitlebar.js",
         "_update@chrome://browser/content/browser-tabsintitlebar.js",
-        "updateAppearance@chrome://browser/content/browser-tabsintitlebar.js",
+        "init@chrome://browser/content/browser-tabsintitlebar.js",
         "handleEvent@chrome://browser/content/tabbrowser.xml",
       ],
       times: 2, // This number should only ever go down - never up.
     },
 
     {
       stack: [
         "handleEvent@chrome://browser/content/tabbrowser.xml",
@@ -79,27 +79,27 @@ if (Services.appinfo.OS == "WINNT") {
 }
 
 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",
-        "updateAppearance@chrome://browser/content/browser-tabsintitlebar.js",
+        "init@chrome://browser/content/browser-tabsintitlebar.js",
         "handleEvent@chrome://browser/content/tabbrowser.xml",
       ],
       times: 4, // This number should only ever go down - never up.
     },
 
     {
       stack: [
         "verticalMargins@chrome://browser/content/browser-tabsintitlebar.js",
         "_update@chrome://browser/content/browser-tabsintitlebar.js",
-        "updateAppearance@chrome://browser/content/browser-tabsintitlebar.js",
+        "init@chrome://browser/content/browser-tabsintitlebar.js",
         "handleEvent@chrome://browser/content/tabbrowser.xml",
       ],
       times: 2, // This number should only ever go down - never up.
     }
   );
 }
 
 /*