diff --git a/browser/base/content/tabview/ui.js b/browser/base/content/tabview/ui.js
index 5d49b44f73f..829687d9e4c 100644
--- a/browser/base/content/tabview/ui.js
+++ b/browser/base/content/tabview/ui.js
@@ -1049,6 +1049,9 @@ let UI = {
     [
 #ifdef XP_UNIX
       "redo",
+#endif
+#ifdef XP_MACOSX
+      "fullScreen",
 #endif
       "closeWindow", "tabview", "undoCloseTab", "undoCloseWindow",
       "privatebrowsing"