This bug was filed from the Socorro interface and is report bp-3e6c35ba-a219-4dbc-8642-dcd480180918. ============================================================= Top 10 frames of crashing thread: 0 xul.dll class PtrInfo* CCGraphBuilder::AddNode xpcom/base/nsCycleCollector.cpp:2244 1 xul.dll CCGraphBuilder::NoteJSChild xpcom/base/nsCycleCollector.cpp:2466 2 xul.dll TraversalTracer::onChild xpcom/base/CycleCollectedJSRuntime.cpp:436 3 xul.dll JS::CallbackTracer::onObjectEdge js/public/TracingAPI.h:151 4 xul.dll union JS::Value js::DispatchTyped<DoCallbackFunctor<JS::Value>, JS::CallbackTracer*&, const char*&> js/public/Value.h:1441 5 xul.dll DoCallback<JS::Value> js/src/gc/Tracer.cpp:73 6 xul.dll js::UnsafeTraceManuallyBarrieredEdge<JS::Value> js/src/gc/Marking.cpp:552 7 xul.dll JSObject::traceChildren js/src/vm/JSObject.cpp:3999 8 xul.dll JS::TraceChildren js/src/gc/Tracer.cpp:120 9 xul.dll void mozilla::CycleCollectedJSRuntime::TraverseGCThing xpcom/base/CycleCollectedJSRuntime.cpp:741 =============================================================