1 files changed, 8 insertions, 0 deletions
diff --git a/accessible/windows/msaa/MsaaRootAccessible.cpp b/accessible/windows/msaa/MsaaRootAccessible.cpp
index ac747ff3d1..2b28edb9b5 100644
--- a/accessible/windows/msaa/MsaaRootAccessible.cpp
+++ b/accessible/windows/msaa/MsaaRootAccessible.cpp
@@ -5,6 +5,7 @@
 
 #include "mozilla/a11y/DocAccessibleParent.h"
 #include "mozilla/dom/BrowserParent.h"
+#include "mozilla/StaticPrefs_accessibility.h"
 #include "mozilla/WindowsVersion.h"
 #include "MsaaRootAccessible.h"
 #include "Relation.h"
@@ -36,6 +37,13 @@ MsaaRootAccessible::InternalQueryInterface(REFIID aIid, void** aOutInterface) {
     return S_OK;
   }
 
+  if (StaticPrefs::accessibility_uia_enable() &&
+      aIid == IID_IRawElementProviderFragmentRoot) {
+    RefPtr<IRawElementProviderFragmentRoot> root = this;
+    root.forget(aOutInterface);
+    return S_OK;
+  }
+
   // ...Otherwise we pass through to the base COM implementation of
   // QueryInterface which is provided by MsaaDocAccessible.
   return MsaaDocAccessible::QueryInterface(aIid, aOutInterface);