diff --git a/toolkit/content/tests/chrome/test_maximized_persist.xul b/toolkit/content/tests/chrome/test_maximized_persist.xul
index be1f7f3c897b..a7e9a56636d4 100644
--- a/toolkit/content/tests/chrome/test_maximized_persist.xul
+++ b/toolkit/content/tests/chrome/test_maximized_persist.xul
@@ -96,6 +96,13 @@
     await changeSizeMode(() => win.maximize());
     win.close();
 
+    // Open a new window again with centerscreen which shouldn't revert
+    // the persisted sizemode.
+    win = openWindow("centerscreen");
+    await SimpleTest.promiseFocus(win);
+    checkWindow("when open with centerscreen", win, win.STATE_MAXIMIZED);
+    win.close();
+
     // Linux doesn't seem to persist sizemode across opening window
     // with specified size, so mark it expected fail for now.
     let todo = navigator.platform.includes('Linux');
diff --git a/xpfe/appshell/nsXULWindow.cpp b/xpfe/appshell/nsXULWindow.cpp
index 82489131843d..cc41ce3d752d 100644
--- a/xpfe/appshell/nsXULWindow.cpp
+++ b/xpfe/appshell/nsXULWindow.cpp
@@ -2357,7 +2357,8 @@ nsXULWindow::SizeShell()
 
   LoadMiscPersistentAttributesFromXUL();
 
-  if (mChromeLoaded && mCenterAfterLoad && !positionSet) {
+  if (mChromeLoaded && mCenterAfterLoad && !positionSet &&
+      mWindow->SizeMode() == nsSizeMode_Normal) {
     Center(parentWindow, parentWindow ? false : true, false);
   }
 }