From a21f2f8be378a1e700dc2190c71d1a424fe1e578 Mon Sep 17 00:00:00 2001
From: ownedbywuigi <ownedbywuigi@gmail.com>
Date: Fri, 3 Apr 2026 10:32:27 +0100
Subject: [PATCH] Fix bug in Windows SMTC

---
 application/basilisk/base/content/browser.js |  2 ++
 widget/nsIWindowsUIUtils.idl                 |  6 +++++
 widget/windows/WindowsUIUtils.cpp            | 28 ++++++++++++++++++++
 3 files changed, 36 insertions(+)

diff --git a/application/basilisk/base/content/browser.js b/application/basilisk/base/content/browser.js
index 0769d286ad..ecba86b1c9 100644
--- a/application/basilisk/base/content/browser.js
+++ b/application/basilisk/base/content/browser.js
@@ -1869,6 +1869,8 @@ function updateWindowsSMTCMetadataFromTab(aTab, aPlaying) {
   uiUtils.setSMTCMetadata(title, artist, album);
   if (thumbnailURL) {
     uiUtils.setSMTCThumbnailURL(thumbnailURL);
+  } else {
+    uiUtils.clearSMTCThumbnail();
   }
   uiUtils.setSMTCPlaybackState(!!aPlaying);
   gLastSMTCMediaTab = tab;
diff --git a/widget/nsIWindowsUIUtils.idl b/widget/nsIWindowsUIUtils.idl
index 9cfb405d11..84c837d41f 100644
--- a/widget/nsIWindowsUIUtils.idl
+++ b/widget/nsIWindowsUIUtils.idl
@@ -41,6 +41,12 @@ interface nsIWindowsUIUtils : nsISupports
    */
   void setSMTCThumbnailURL(in AString aThumbnailURL);
 
+  /**
+   * Clear native Windows System Media Transport Controls artwork.
+   * No-op on unsupported Windows versions.
+   */
+  void clearSMTCThumbnail();
+
   /**
    * Clear native Windows System Media Transport Controls metadata.
    * No-op on unsupported Windows versions.
diff --git a/widget/windows/WindowsUIUtils.cpp b/widget/windows/WindowsUIUtils.cpp
index 78ac39b93c..ea406e9b87 100644
--- a/widget/windows/WindowsUIUtils.cpp
+++ b/widget/windows/WindowsUIUtils.cpp
@@ -494,6 +494,34 @@ WindowsUIUtils::SetSMTCThumbnailURL(const nsAString& aThumbnailURL)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+WindowsUIUtils::ClearSMTCThumbnail()
+{
+#ifndef __MINGW32__
+  if (!IsWin10OrLater()) {
+    return NS_OK;
+  }
+
+  nsresult rv = EnsureSMTC();
+  if (NS_FAILED(rv)) {
+    return NS_OK;
+  }
+  if (!gSMTC) {
+    return NS_OK;
+  }
+
+  ComPtr<ISystemMediaTransportControlsDisplayUpdater> updater;
+  HRESULT hr = gSMTC->get_DisplayUpdater(&updater);
+  if (FAILED(hr) || !updater) {
+    return NS_OK;
+  }
+
+  updater->put_Thumbnail(nullptr);
+  updater->Update();
+#endif
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 WindowsUIUtils::ClearSMTCMetadata()
 {