--- a/dom/media/webspeech/synth/cocoa/OSXSpeechSynthesizerService.mm
+++ b/dom/media/webspeech/synth/cocoa/OSXSpeechSynthesizerService.mm
@@ -416,32 +416,33 @@ OSXSpeechSynthesizerService::GetServiceT
   *aServiceType = nsISpeechService::SERVICETYPE_INDIRECT_AUDIO;
   return NS_OK;
 }
 
 NS_IMETHODIMP
 OSXSpeechSynthesizerService::Observe(nsISupports* aSubject, const char* aTopic,
                                      const char16_t* aData)
 {
-  if (!strcmp(aTopic, "profile-after-change")) {
-    Init();
-  }
   return NS_OK;
 }
 
 OSXSpeechSynthesizerService*
 OSXSpeechSynthesizerService::GetInstance()
 {
   MOZ_ASSERT(NS_IsMainThread());
   if (XRE_GetProcessType() != GeckoProcessType_Default) {
     return nullptr;
   }
 
   if (!sSingleton) {
-    sSingleton = new OSXSpeechSynthesizerService();
+    RefPtr<OSXSpeechSynthesizerService> speechService =
+      new OSXSpeechSynthesizerService();
+    if (speechService->Init()) {
+      sSingleton = speechService;
+    }
   }
   return sSingleton;
 }
 
 already_AddRefed<OSXSpeechSynthesizerService>
 OSXSpeechSynthesizerService::GetInstanceForService()
 {
   RefPtr<OSXSpeechSynthesizerService> speechService = GetInstance();