diff --git a/dom/media/webspeech/synth/SpeechSynthesis.cpp b/dom/media/webspeech/synth/SpeechSynthesis.cpp
index 189e3590cc..e0ceac6c9f 100644
--- a/dom/media/webspeech/synth/SpeechSynthesis.cpp
+++ b/dom/media/webspeech/synth/SpeechSynthesis.cpp
@@ -293,6 +293,12 @@ SpeechSynthesis::ForceEnd()
   }
 }
 
+void SpeechSynthesis::DisconnectFromOwner() {
+  Pause();
+  Cancel();
+  DOMEventTargetHelper::DisconnectFromOwner();
+}
+
 NS_IMETHODIMP
 SpeechSynthesis::Observe(nsISupports* aSubject, const char* aTopic,
                          const char16_t* aData)
diff --git a/dom/media/webspeech/synth/SpeechSynthesis.h b/dom/media/webspeech/synth/SpeechSynthesis.h
index 692ef73edb..55e7bb5df7 100644
--- a/dom/media/webspeech/synth/SpeechSynthesis.h
+++ b/dom/media/webspeech/synth/SpeechSynthesis.h
@@ -58,6 +58,8 @@ public:
   void GetVoices(nsTArray< RefPtr<SpeechSynthesisVoice> >& aResult);
 
   void ForceEnd();
+  
+  void DisconnectFromOwner() override;
 
   IMPL_EVENT_HANDLER(voiceschanged)