From efbe3cb9091c7db3bf40458ce31d012b85cb7ac5 Mon Sep 17 00:00:00 2001
From: Daniel Holbert <dholbert@cs.stanford.edu>
Date: Fri, 24 Apr 2026 15:59:17 +0200
Subject: [PATCH] Bug 2026293: Block scripts when initiating async scrollbar
 activity.

---
 layout/generic/ScrollbarActivity.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/layout/generic/ScrollbarActivity.cpp b/layout/generic/ScrollbarActivity.cpp
index 78859bc2be..f6bf6f2baa 100644
--- a/layout/generic/ScrollbarActivity.cpp
+++ b/layout/generic/ScrollbarActivity.cpp
@@ -62,6 +62,7 @@ ScrollbarActivity::Destroy()
 void
 ScrollbarActivity::ActivityOccurred()
 {
+  nsAutoScriptBlocker scriptBlocker;
   ActivityStarted();
   ActivityStopped();
 }