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-rw-r--r--widget/nsBaseDragService.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/widget/nsBaseDragService.cpp b/widget/nsBaseDragService.cpp
index bdd8d2bd28..212038e0e4 100644
--- a/widget/nsBaseDragService.cpp
+++ b/widget/nsBaseDragService.cpp
@@ -632,6 +632,7 @@ nsBaseDragService::EndDragSession(bool aDoneDrag, uint32_t aKeyModifiers) {
mSourceDocument = nullptr;
mSourceNode = nullptr;
mSourceWindowContext = nullptr;
+ mSourceTopWindowContext = nullptr;
mTriggeringPrincipal = nullptr;
mCsp = nullptr;
mSelection = nullptr;