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-rw-r--r--dom/base/DocGroup.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/dom/base/DocGroup.cpp b/dom/base/DocGroup.cpp
index 226879985..30c058f0c 100644
--- a/dom/base/DocGroup.cpp
+++ b/dom/base/DocGroup.cpp
@@ -46,6 +46,9 @@ DocGroup::DocGroup(TabGroup* aTabGroup, const nsACString& aKey)
DocGroup::~DocGroup()
{
MOZ_ASSERT(mDocuments.IsEmpty());
+ if (!NS_IsMainThread()) {
+ NS_ReleaseOnMainThread(mReactionsStack.forget());
+ }
mTabGroup->mDocGroups.RemoveEntry(mKey);
}