PR_AtomicDecrement(&g_InstanceCount);
nsNativeDetector::~nsNativeDetector(){  NS_IF_RELEASE(mObserver);  if (NULL != mMultiLanguage)    mMultiLanguage->Release();  if (NULL != mMLangConvertCharset)    mMLangConvertCharset->Release();  CoUninitialize();  PR_AtomicDecrement(&g_InstanceCount);}