From e69b52eac1364dc02409d666dd94950985ff79e0 Mon Sep 17 00:00:00 2001
From: Moonchild <moonchild@palemoon.org>
Date: Wed, 26 Oct 2022 08:05:04 +0000
Subject: [PATCH] Hold some strong references on nsRefreshDriver

---
 dom/base/nsDOMWindowUtils.cpp | 2 +-
 image/SVGDocumentWrapper.cpp  | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/dom/base/nsDOMWindowUtils.cpp b/dom/base/nsDOMWindowUtils.cpp
index 69f1787b9f..18204efdc1 100644
--- a/dom/base/nsDOMWindowUtils.cpp
+++ b/dom/base/nsDOMWindowUtils.cpp
@@ -2409,7 +2409,7 @@ nsDOMWindowUtils::AdvanceTimeAndRefresh(int64_t aMilliseconds)
 
   nsPresContext* presContext = GetPresContext();
   if (presContext) {
-    nsRefreshDriver* driver = presContext->RefreshDriver();
+    RefPtr<nsRefreshDriver> driver = presContext->RefreshDriver();
     driver->AdvanceTimeAndRefresh(aMilliseconds);
 
     RefPtr<LayerTransactionChild> transaction = GetLayerTransaction();
diff --git a/image/SVGDocumentWrapper.cpp b/image/SVGDocumentWrapper.cpp
index d4b71b907c..6438c179e4 100644
--- a/image/SVGDocumentWrapper.cpp
+++ b/image/SVGDocumentWrapper.cpp
@@ -212,9 +212,12 @@ SVGDocumentWrapper::TickRefreshDriver()
   nsCOMPtr<nsIPresShell> presShell;
   mViewer->GetPresShell(getter_AddRefs(presShell));
   if (presShell) {
-    nsPresContext* presContext = presShell->GetPresContext();
+    RefPtr<nsPresContext> presContext = presShell->GetPresContext();
     if (presContext) {
-      presContext->RefreshDriver()->DoTick();
+      RefPtr<nsRefreshDriver> driver = presContext->RefreshDriver();
+      if (driver) {
+        driver->DoTick();
+      }
     }
   }
 }