2 files changed, 3 insertions, 16 deletions
diff --git a/browser/components/customizableui/CustomizableUI.jsm b/browser/components/customizableui/CustomizableUI.jsm
index 86ff2708b..01389108d 100644
--- a/browser/components/customizableui/CustomizableUI.jsm
+++ b/browser/components/customizableui/CustomizableUI.jsm
@@ -262,24 +262,14 @@ var CustomizableUIInternal = {
       defaultCollapsed: false,
     }, true);
 
-    if (AppConstants.platform != "macosx") {
+    if (AppConstants.MENUBAR_CAN_AUTOHIDE) {
       this.registerArea(CustomizableUI.AREA_MENUBAR, {
         legacy: true,
         type: CustomizableUI.TYPE_TOOLBAR,
         defaultPlacements: [
           "menubar-items",
         ],
-        get defaultCollapsed() {
-          if (AppConstants.MENUBAR_CAN_AUTOHIDE) {
-            if (AppConstants.platform == "linux") {
-              return true;
-            }
-            // This is duplicated logic from /browser/base/jar.mn
-            // for win6BrowserOverlay.xul.
-            return AppConstants.isPlatformAndVersionAtLeast("win", 6);
-          }
-          return false;
-        }
+        defaultCollapsed: true,
       }, true);
     }
 
diff --git a/browser/components/customizableui/CustomizableWidgets.jsm b/browser/components/customizableui/CustomizableWidgets.jsm
index 907e2e0f7..1e68b01c1 100644
--- a/browser/components/customizableui/CustomizableWidgets.jsm
+++ b/browser/components/customizableui/CustomizableWidgets.jsm
@@ -1187,10 +1187,7 @@ let preferencesButton = {
     win.openPreferences();
   }
 };
-if (AppConstants.platform == "win") {
-  preferencesButton.label = "preferences-button.labelWin";
-  preferencesButton.tooltiptext = "preferences-button.tooltipWin2";
-} else if (AppConstants.platform == "macosx") {
+if (AppConstants.platform == "macosx") {
   preferencesButton.tooltiptext = "preferences-button.tooltiptext.withshortcut";
   preferencesButton.shortcutId = "key_preferencesCmdMac";
 } else {