--- a/dom/media/webaudio/AudioBufferSourceNode.cpp
+++ b/dom/media/webaudio/AudioBufferSourceNode.cpp
@@ -664,19 +664,16 @@ AudioBufferSourceNode::Create(JSContext*
 void
 AudioBufferSourceNode::DestroyMediaStream()
 {
   bool hadStream = mStream;
   if (hadStream) {
     mStream->RemoveMainThreadListener(this);
   }
   AudioNode::DestroyMediaStream();
-  if (hadStream && Context()) {
-    Context()->UnregisterAudioBufferSourceNode(this);
-  }
 }
 
 size_t
 AudioBufferSourceNode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
 {
   size_t amount = AudioNode::SizeOfExcludingThis(aMallocSizeOf);
 
   /* mBuffer can be shared and is accounted for separately. */

--- a/dom/media/webaudio/AudioContext.cpp
+++ b/dom/media/webaudio/AudioContext.cpp
@@ -88,17 +88,16 @@ NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(Au
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mListener)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mPromiseGripArray)
   NS_IMPL_CYCLE_COLLECTION_UNLINK(mPendingResumePromises)
   if (!tmp->mIsStarted) {
     NS_IMPL_CYCLE_COLLECTION_UNLINK(mActiveNodes)
   }
   // mDecodeJobs owns the WebAudioDecodeJob objects whose lifetime is managed explicitly.
   // mAllNodes is an array of weak pointers, ignore it here.
-  // mPannerNodes is an array of weak pointers, ignore it here.
   // mBasicWaveFormCache cannot participate in cycles, ignore it here.
 
   // Remove weak reference on the global window as the context is not usable
   // without mDestination.
   tmp->DisconnectFromWindow();
 NS_IMPL_CYCLE_COLLECTION_UNLINK_END_INHERITED(DOMEventTargetHelper)
 
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(AudioContext,
@@ -109,17 +108,16 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_
   NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPendingResumePromises)
   if (!tmp->mIsStarted) {
     MOZ_ASSERT(tmp->mIsOffline,
                "Online AudioContexts should always be started");
     NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mActiveNodes)
   }
   // mDecodeJobs owns the WebAudioDecodeJob objects whose lifetime is managed explicitly.
   // mAllNodes is an array of weak pointers, ignore it here.
-  // mPannerNodes is an array of weak pointers, ignore it here.
   // mBasicWaveFormCache cannot participate in cycles, ignore it here.
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
 
 NS_IMPL_ADDREF_INHERITED(AudioContext, DOMEventTargetHelper)
 NS_IMPL_RELEASE_INHERITED(AudioContext, DOMEventTargetHelper)
 
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(AudioContext)
   NS_INTERFACE_MAP_ENTRY(nsIMemoryReporter)
@@ -651,38 +649,23 @@ AudioContext::RegisterActiveNode(AudioNo
 
 void
 AudioContext::UnregisterActiveNode(AudioNode* aNode)
 {
   mActiveNodes.RemoveEntry(aNode);
 }
 
 void
-AudioContext::UnregisterAudioBufferSourceNode(AudioBufferSourceNode* aNode)
-{
-  UpdatePannerSource();
-}
-
-void
 AudioContext::UnregisterPannerNode(PannerNode* aNode)
 {
-  mPannerNodes.RemoveEntry(aNode);
   if (mListener) {
     mListener->UnregisterPannerNode(aNode);
   }
 }
 
-void
-AudioContext::UpdatePannerSource()
-{
-  for (auto iter = mPannerNodes.Iter(); !iter.Done(); iter.Next()) {
-    iter.Get()->GetKey()->FindConnectedSources();
-  }
-}
-
 uint32_t
 AudioContext::MaxChannelCount() const
 {
   return std::min<uint32_t>(WebAudioUtils::MaxChannelCount,
       mIsOffline ? mNumberOfChannels : CubebUtils::MaxNumberOfChannels());
 }
 
 uint32_t
@@ -1197,17 +1180,16 @@ AudioContext::SizeOfIncludingThis(mozill
   if (mListener) {
     amount += mListener->SizeOfIncludingThis(aMallocSizeOf);
   }
   amount += mDecodeJobs.ShallowSizeOfExcludingThis(aMallocSizeOf);
   for (uint32_t i = 0; i < mDecodeJobs.Length(); ++i) {
     amount += mDecodeJobs[i]->SizeOfIncludingThis(aMallocSizeOf);
   }
   amount += mActiveNodes.ShallowSizeOfExcludingThis(aMallocSizeOf);
-  amount += mPannerNodes.ShallowSizeOfExcludingThis(aMallocSizeOf);
   return amount;
 }
 
 NS_IMETHODIMP
 AudioContext::CollectReports(nsIHandleReportCallback* aHandleReport,
                              nsISupports* aData, bool aAnonymize)
 {
   const nsLiteralCString

--- a/dom/media/webaudio/AudioContext.h
+++ b/dom/media/webaudio/AudioContext.h
@@ -304,19 +304,17 @@ public:
   // Nodes unregister when they have finished producing sound for the
   // foreseeable future.
   // Do NOT call UnregisterActiveNode from an AudioNode destructor.
   // If the destructor is called, then the Node has already been unregistered.
   // The destructor may be called during hashtable enumeration, during which
   // unregistering would not be safe.
   void UnregisterActiveNode(AudioNode* aNode);
 
-  void UnregisterAudioBufferSourceNode(AudioBufferSourceNode* aNode);
   void UnregisterPannerNode(PannerNode* aNode);
-  void UpdatePannerSource();
 
   uint32_t MaxChannelCount() const;
 
   uint32_t ActiveNodeCount() const;
 
   void Mute() const;
   void Unmute() const;
 
@@ -366,19 +364,16 @@ private:
   // is not allowed to play, the promise would be pending in this array and be
   // resolved until audio context has been allowed and user call resume() again.
   nsTArray<RefPtr<Promise>> mPendingResumePromises;
   // See RegisterActiveNode.  These will keep the AudioContext alive while it
   // is rendering and the window remains alive.
   nsTHashtable<nsRefPtrHashKey<AudioNode> > mActiveNodes;
   // Raw (non-owning) references to all AudioNodes for this AudioContext.
   nsTHashtable<nsPtrHashKey<AudioNode> > mAllNodes;
-  // Hashsets containing all the PannerNodes, to compute the doppler shift.
-  // These are weak pointers.
-  nsTHashtable<nsPtrHashKey<PannerNode> > mPannerNodes;
   // Cache to avoid recomputing basic waveforms all the time.
   RefPtr<BasicWaveFormCache> mBasicWaveFormCache;
   // Number of channels passed in the OfflineAudioContext ctor.
   uint32_t mNumberOfChannels;
   bool mIsOffline;
   bool mIsStarted;
   bool mIsShutDown;
   // Close has been called, reject suspend and resume call.

--- a/dom/media/webaudio/AudioListener.cpp
+++ b/dom/media/webaudio/AudioListener.cpp
@@ -16,19 +16,16 @@ NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Au
 NS_IMPL_CYCLE_COLLECTION_ROOT_NATIVE(AudioListener, AddRef)
 NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioListener, Release)
 
 AudioListener::AudioListener(AudioContext* aContext)
   : mContext(aContext)
   , mPosition()
   , mFrontVector(0., 0., -1.)
   , mRightVector(1., 0., 0.)
-  , mVelocity()
-  , mDopplerFactor(1.)
-  , mSpeedOfSound(343.3) // meters/second
 {
   MOZ_ASSERT(aContext);
 }
 
 JSObject*
 AudioListener::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
 {
   return AudioListener_Binding::Wrap(aCx, this, aGivenProto);
@@ -72,20 +69,16 @@ void
 AudioListener::RegisterPannerNode(PannerNode* aPannerNode)
 {
   mPanners.AppendElement(aPannerNode);
 
   // Let the panner node know about our parameters
   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_POSITION, mPosition);
   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_FRONT_VECTOR, mFrontVector);
   aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_RIGHT_VECTOR, mRightVector);
-  aPannerNode->SendThreeDPointParameterToStream(PannerNode::LISTENER_VELOCITY, mVelocity);
-  aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_DOPPLER_FACTOR, mDopplerFactor);
-  aPannerNode->SendDoubleParameterToStream(PannerNode::LISTENER_SPEED_OF_SOUND, mSpeedOfSound);
-  UpdatePannersVelocity();
 }
 
 void AudioListener::UnregisterPannerNode(PannerNode* aPannerNode)
 {
   mPanners.RemoveElement(aPannerNode);
 }
 
 void
@@ -103,25 +96,16 @@ AudioListener::SendThreeDPointParameterT
 {
   for (uint32_t i = 0; i < mPanners.Length(); ++i) {
     if (mPanners[i]) {
       mPanners[i]->SendThreeDPointParameterToStream(aIndex, aValue);
     }
   }
 }
 
-void AudioListener::UpdatePannersVelocity()
-{
-  for (uint32_t i = 0; i < mPanners.Length(); ++i) {
-    if (mPanners[i]) {
-      mPanners[i]->SendDopplerToSourcesIfNeeded();
-    }
-  }
-}
-
 size_t
 AudioListener::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
 {
   size_t amount = aMallocSizeOf(this);
   // AudioNodes are tracked separately
   amount += mPanners.ShallowSizeOfExcludingThis(aMallocSizeOf);
   return amount;
 }

--- a/dom/media/webaudio/AudioListener.h
+++ b/dom/media/webaudio/AudioListener.h
@@ -33,42 +33,16 @@ public:
 
   AudioContext* GetParentObject() const
   {
     return mContext;
   }
 
   JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
 
-  double DopplerFactor() const
-  {
-    return mDopplerFactor;
-  }
-  void SetDopplerFactor(double aDopplerFactor)
-  {
-    if (WebAudioUtils::FuzzyEqual(mDopplerFactor, aDopplerFactor)) {
-      return;
-    }
-    mDopplerFactor = aDopplerFactor;
-    SendDoubleParameterToStream(PannerNode::LISTENER_DOPPLER_FACTOR, mDopplerFactor);
-  }
-
-  double SpeedOfSound() const
-  {
-    return mSpeedOfSound;
-  }
-  void SetSpeedOfSound(double aSpeedOfSound)
-  {
-    if (WebAudioUtils::FuzzyEqual(mSpeedOfSound, aSpeedOfSound)) {
-      return;
-    }
-    mSpeedOfSound = aSpeedOfSound;
-    SendDoubleParameterToStream(PannerNode::LISTENER_SPEED_OF_SOUND, mSpeedOfSound);
-  }
-
   void SetPosition(double aX, double aY, double aZ)
   {
     if (WebAudioUtils::FuzzyEqual(mPosition.x, aX) &&
         WebAudioUtils::FuzzyEqual(mPosition.y, aY) &&
         WebAudioUtils::FuzzyEqual(mPosition.z, aZ)) {
       return;
     }
     mPosition.x = aX;
@@ -80,54 +54,30 @@ public:
   const ThreeDPoint& Position() const
   {
     return mPosition;
   }
 
   void SetOrientation(double aX, double aY, double aZ,
                       double aXUp, double aYUp, double aZUp);
 
-  const ThreeDPoint& Velocity() const
-  {
-    return mVelocity;
-  }
-
-  void SetVelocity(double aX, double aY, double aZ)
-  {
-    if (WebAudioUtils::FuzzyEqual(mVelocity.x, aX) &&
-        WebAudioUtils::FuzzyEqual(mVelocity.y, aY) &&
-        WebAudioUtils::FuzzyEqual(mVelocity.z, aZ)) {
-      return;
-    }
-    mVelocity.x = aX;
-    mVelocity.y = aY;
-    mVelocity.z = aZ;
-    SendThreeDPointParameterToStream(PannerNode::LISTENER_VELOCITY, mVelocity);
-    UpdatePannersVelocity();
-  }
-
   void RegisterPannerNode(PannerNode* aPannerNode);
   void UnregisterPannerNode(PannerNode* aPannerNode);
 
 private:
   ~AudioListener() {}
 
   void SendDoubleParameterToStream(uint32_t aIndex, double aValue);
   void SendThreeDPointParameterToStream(uint32_t aIndex, const ThreeDPoint& aValue);
-  void UpdatePannersVelocity();
-
 private:
   friend class PannerNode;
   RefPtr<AudioContext> mContext;
   ThreeDPoint mPosition;
   ThreeDPoint mFrontVector;
   ThreeDPoint mRightVector;
-  ThreeDPoint mVelocity;
-  double mDopplerFactor;
-  double mSpeedOfSound;
   nsTArray<WeakPtr<PannerNode> > mPanners;
 };
 
 } // namespace dom
 } // namespace mozilla
 
 #endif
 

--- a/dom/media/webaudio/AudioNode.cpp
+++ b/dom/media/webaudio/AudioNode.cpp
@@ -239,19 +239,16 @@ AudioNode::Connect(AudioNode& aDestinati
     MOZ_ASSERT(aOutput <= UINT16_MAX, "Unexpected large output port number");
     input->mStreamPort = destinationStream->
       AllocateInputPort(mStream, AudioNodeStream::AUDIO_TRACK, TRACK_ANY,
                         static_cast<uint16_t>(aInput),
                         static_cast<uint16_t>(aOutput));
   }
   aDestination.NotifyInputsChanged();
 
-  // This connection may have connected a panner and a source.
-  Context()->UpdatePannerSource();
-
   return &aDestination;
 }
 
 void
 AudioNode::Connect(AudioParam& aDestination, uint32_t aOutput,
                    ErrorResult& aRv)
 {
   if (aOutput >= NumberOfOutputs()) {
@@ -449,19 +446,16 @@ AudioNode::Disconnect(ErrorResult& aRv)
 
   for (int32_t outputIndex = mOutputParams.Length() - 1;
        outputIndex >= 0; --outputIndex) {
     DisconnectMatchingDestinationInputs<AudioParam>(outputIndex,
                                                     [](const InputNode&) {
                                                       return true;
                                                     });
   }
-
-  // This disconnection may have disconnected a panner and a source.
-  Context()->UpdatePannerSource();
 }
 
 void
 AudioNode::Disconnect(uint32_t aOutput, ErrorResult& aRv)
 {
   if (aOutput >= NumberOfOutputs()) {
     aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
     return;
@@ -479,19 +473,16 @@ AudioNode::Disconnect(uint32_t aOutput, 
   for (int32_t outputIndex = mOutputParams.Length() - 1;
        outputIndex >= 0; --outputIndex) {
     DisconnectMatchingDestinationInputs<AudioParam>(
         outputIndex,
         [aOutput](const InputNode& aInputNode) {
           return aInputNode.mOutputPort == aOutput;
         });
   }
-
-  // This disconnection may have disconnected a panner and a source.
-  Context()->UpdatePannerSource();
 }
 
 void
 AudioNode::Disconnect(AudioNode& aDestination, ErrorResult& aRv)
 {
   bool wasConnected = false;
 
   for (int32_t outputIndex = mOutputNodes.Length() - 1;
@@ -505,19 +496,16 @@ AudioNode::Disconnect(AudioNode& aDestin
                                                        return true;
                                                      });
   }
 
   if (!wasConnected) {
     aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
     return;
   }
-
-  // This disconnection may have disconnected a panner and a source.
-  Context()->UpdatePannerSource();
 }
 
 void
 AudioNode::Disconnect(AudioNode& aDestination,
                       uint32_t aOutput,
                       ErrorResult& aRv)
 {
   if (aOutput >= NumberOfOutputs()) {
@@ -539,19 +527,16 @@ AudioNode::Disconnect(AudioNode& aDestin
             return aInputNode.mOutputPort == aOutput;
           });
   }
 
   if (!wasConnected) {
     aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
     return;
   }
-
-  // This disconnection may have disconnected a panner and a source.
-  Context()->UpdatePannerSource();
 }
 
 void
 AudioNode::Disconnect(AudioNode& aDestination,
                       uint32_t aOutput,
                       uint32_t aInput,
                       ErrorResult& aRv)
 {
@@ -580,19 +565,16 @@ AudioNode::Disconnect(AudioNode& aDestin
                    aInputNode.mInputPort == aInput;
           });
   }
 
   if (!wasConnected) {
     aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
     return;
   }
-
-  // This disconnection may have disconnected a panner and a source.
-  Context()->UpdatePannerSource();
 }
 
 void
 AudioNode::Disconnect(AudioParam& aDestination, ErrorResult& aRv)
 {
   bool wasConnected = false;
 
   for (int32_t outputIndex = mOutputParams.Length() - 1;

--- a/dom/media/webaudio/PannerNode.cpp
+++ b/dom/media/webaudio/PannerNode.cpp
@@ -22,19 +22,16 @@ using WebCore::HRTFPanner;
 
 namespace mozilla {
 namespace dom {
 
 using namespace std;
 
 NS_IMPL_CYCLE_COLLECTION_CLASS(PannerNode)
 NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(PannerNode, AudioNode)
-  if (tmp->Context()) {
-    tmp->Context()->UnregisterPannerNode(tmp);
-  }
 NS_IMPL_CYCLE_COLLECTION_UNLINK(mPositionX, mPositionY, mPositionZ, mOrientationX, mOrientationY, mOrientationZ)
 NS_IMPL_CYCLE_COLLECTION_UNLINK_END
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(PannerNode, AudioNode)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mPositionX, mPositionY, mPositionZ, mOrientationX, mOrientationY, mOrientationZ)
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
 
 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(PannerNode)
 NS_INTERFACE_MAP_END_INHERITING(AudioNode)
@@ -52,27 +49,22 @@ public:
     , mPanningModelFunction(&PannerNodeEngine::EqualPowerPanningFunction)
     , mDistanceModelFunction(&PannerNodeEngine::InverseGainFunction)
     , mPositionX(0.)
     , mPositionY(0.)
     , mPositionZ(0.)
     , mOrientationX(1.)
     , mOrientationY(0.)
     , mOrientationZ(0.)
-    , mVelocity()
     , mRefDistance(1.)
     , mMaxDistance(10000.)
     , mRolloffFactor(1.)
     , mConeInnerAngle(360.)
     , mConeOuterAngle(360.)
     , mConeOuterGain(0.)
-    // These will be initialized when a PannerNode is created, so just initialize them
-    // to some dummy values here.
-    , mListenerDopplerFactor(0.)
-    , mListenerSpeedOfSound(0.)
     , mLeftOverData(INT_MIN)
   {
   }
 
   void RecvTimelineEvent(uint32_t aIndex, AudioTimelineEvent& aEvent) override
   {
     MOZ_ASSERT(mDestination);
     WebAudioUtils::ConvertAudioTimelineEventToTicks(aEvent,
@@ -150,37 +142,33 @@ public:
     }
   }
   void SetThreeDPointParameter(uint32_t aIndex, const ThreeDPoint& aParam) override
   {
     switch (aIndex) {
     case PannerNode::LISTENER_POSITION: mListenerPosition = aParam; break;
     case PannerNode::LISTENER_FRONT_VECTOR: mListenerFrontVector = aParam; break;
     case PannerNode::LISTENER_RIGHT_VECTOR: mListenerRightVector = aParam; break;
-    case PannerNode::LISTENER_VELOCITY: mListenerVelocity = aParam; break;
     case PannerNode::POSITION:
       mPositionX.SetValue(aParam.x);
       mPositionY.SetValue(aParam.y);
       mPositionZ.SetValue(aParam.z);
       break;
     case PannerNode::ORIENTATION:
       mOrientationX.SetValue(aParam.x);
       mOrientationY.SetValue(aParam.y);
       mOrientationZ.SetValue(aParam.z);
       break;
-    case PannerNode::VELOCITY: mVelocity = aParam; break;
     default:
       NS_ERROR("Bad PannerNodeEngine ThreeDPointParameter");
     }
   }
   void SetDoubleParameter(uint32_t aIndex, double aParam) override
   {
     switch (aIndex) {
-    case PannerNode::LISTENER_DOPPLER_FACTOR: mListenerDopplerFactor = aParam; break;
-    case PannerNode::LISTENER_SPEED_OF_SOUND: mListenerSpeedOfSound = aParam; break;
     case PannerNode::REF_DISTANCE: mRefDistance = aParam; break;
     case PannerNode::MAX_DISTANCE: mMaxDistance = aParam; break;
     case PannerNode::ROLLOFF_FACTOR: mRolloffFactor = aParam; break;
     case PannerNode::CONE_INNER_ANGLE: mConeInnerAngle = aParam; break;
     case PannerNode::CONE_OUTER_ANGLE: mConeOuterAngle = aParam; break;
     case PannerNode::CONE_OUTER_GAIN: mConeOuterGain = aParam; break;
     default:
       NS_ERROR("Bad PannerNodeEngine DoubleParameter");
@@ -272,29 +260,25 @@ public:
   typedef float (PannerNodeEngine::*DistanceModelFunction)(double aDistance);
   DistanceModelFunction mDistanceModelFunction;
   AudioParamTimeline mPositionX;
   AudioParamTimeline mPositionY;
   AudioParamTimeline mPositionZ;
   AudioParamTimeline mOrientationX;
   AudioParamTimeline mOrientationY;
   AudioParamTimeline mOrientationZ;
-  ThreeDPoint mVelocity;
   double mRefDistance;
   double mMaxDistance;
   double mRolloffFactor;
   double mConeInnerAngle;
   double mConeOuterAngle;
   double mConeOuterGain;
   ThreeDPoint mListenerPosition;
   ThreeDPoint mListenerFrontVector;
   ThreeDPoint mListenerRightVector;
-  ThreeDPoint mListenerVelocity;
-  double mListenerDopplerFactor;
-  double mListenerSpeedOfSound;
   int mLeftOverData;
 };
 
 PannerNode::PannerNode(AudioContext* aContext)
   : AudioNode(aContext,
               2,
               ChannelCountMode::Clamped_max,
               ChannelInterpretation::Speakers)
@@ -302,17 +286,16 @@ PannerNode::PannerNode(AudioContext* aCo
   , mPanningModel(PanningModelType::Equalpower)
   , mDistanceModel(DistanceModelType::Inverse)
   , mPositionX(new AudioParam(this, PannerNode::POSITIONX, this->NodeType(), 0.f))
   , mPositionY(new AudioParam(this, PannerNode::POSITIONY, this->NodeType(), 0.f))
   , mPositionZ(new AudioParam(this, PannerNode::POSITIONZ, this->NodeType(), 0.f))
   , mOrientationX(new AudioParam(this, PannerNode::ORIENTATIONX, this->NodeType(), 1.0f))
   , mOrientationY(new AudioParam(this, PannerNode::ORIENTATIONY, this->NodeType(), 0.f))
   , mOrientationZ(new AudioParam(this, PannerNode::ORIENTATIONZ, this->NodeType(), 0.f))
-  , mVelocity()
   , mRefDistance(1.)
   , mMaxDistance(10000.)
   , mRolloffFactor(1.)
   , mConeInnerAngle(360.)
   , mConeOuterAngle(360.)
   , mConeOuterGain(0.)
 {
   mStream = AudioNodeStream::Create(aContext,
@@ -372,19 +355,17 @@ void PannerNode::SetPanningModel(Panning
     static_cast<PannerNodeEngine*>(mStream->Engine())->CreateHRTFPanner();
   }
   SendInt32ParameterToStream(PANNING_MODEL, int32_t(mPanningModel));
 }
 
 size_t
 PannerNode::SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const
 {
-  size_t amount = AudioNode::SizeOfExcludingThis(aMallocSizeOf);
-  amount += mSources.ShallowSizeOfExcludingThis(aMallocSizeOf);
-  return amount;
+  return AudioNode::SizeOfExcludingThis(aMallocSizeOf);
 }
 
 size_t
 PannerNode::SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const
 {
   return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
 }
 
@@ -733,98 +714,10 @@ PannerNodeEngine::ComputeConeGain(const 
 double
 PannerNodeEngine::ComputeDistanceGain(const ThreeDPoint& position)
 {
   ThreeDPoint distanceVec = position - mListenerPosition;
   float distance = sqrt(distanceVec.DotProduct(distanceVec));
   return std::max(0.0f, (this->*mDistanceModelFunction)(distance));
 }
 
-float
-PannerNode::ComputeDopplerShift()
-{
-  double dopplerShift = 1.0; // Initialize to default value
-
-  AudioListener* listener = Context()->Listener();
-
-  if (listener->DopplerFactor() > 0) {
-    // Don't bother if both source and listener have no velocity.
-    if (!mVelocity.IsZero() || !listener->Velocity().IsZero()) {
-      // Calculate the source to listener vector.
-      ThreeDPoint sourceToListener = ConvertAudioParamTo3DP(mPositionX, mPositionY, mPositionZ) - listener->Velocity();
-
-      double sourceListenerMagnitude = sourceToListener.Magnitude();
-
-      double listenerProjection = sourceToListener.DotProduct(listener->Velocity()) / sourceListenerMagnitude;
-      double sourceProjection = sourceToListener.DotProduct(mVelocity) / sourceListenerMagnitude;
-
-      listenerProjection = -listenerProjection;
-      sourceProjection = -sourceProjection;
-
-      double scaledSpeedOfSound = listener->SpeedOfSound() / listener->DopplerFactor();
-      listenerProjection = min(listenerProjection, scaledSpeedOfSound);
-      sourceProjection = min(sourceProjection, scaledSpeedOfSound);
-
-      dopplerShift = ((listener->SpeedOfSound() - listener->DopplerFactor() * listenerProjection) / (listener->SpeedOfSound() - listener->DopplerFactor() * sourceProjection));
-
-      WebAudioUtils::FixNaN(dopplerShift); // Avoid illegal values
-
-      // Limit the pitch shifting to 4 octaves up and 3 octaves down.
-      dopplerShift = min(dopplerShift, 16.);
-      dopplerShift = max(dopplerShift, 0.125);
-    }
-  }
-
-  return dopplerShift;
-}
-
-void
-PannerNode::FindConnectedSources()
-{
-  mSources.Clear();
-  std::set<AudioNode*> cycleSet;
-  FindConnectedSources(this, mSources, cycleSet);
-}
-
-void
-PannerNode::FindConnectedSources(AudioNode* aNode,
-                                 nsTArray<AudioBufferSourceNode*>& aSources,
-                                 std::set<AudioNode*>& aNodesSeen)
-{
-  if (!aNode) {
-    return;
-  }
-
-  const nsTArray<InputNode>& inputNodes = aNode->InputNodes();
-
-  for(unsigned i = 0; i < inputNodes.Length(); i++) {
-    // Return if we find a node that we have seen already.
-    if (aNodesSeen.find(inputNodes[i].mInputNode) != aNodesSeen.end()) {
-      return;
-    }
-    aNodesSeen.insert(inputNodes[i].mInputNode);
-    // Recurse
-    FindConnectedSources(inputNodes[i].mInputNode, aSources, aNodesSeen);
-
-    // Check if this node is an AudioBufferSourceNode that still have a stream,
-    // which means it has not finished playing.
-    AudioBufferSourceNode* node = inputNodes[i].mInputNode->AsAudioBufferSourceNode();
-    if (node && node->GetStream()) {
-      aSources.AppendElement(node);
-    }
-  }
-}
-
-void
-PannerNode::SendDopplerToSourcesIfNeeded()
-{
-  // Don't bother sending the doppler shift if both the source and the listener
-  // are not moving, because the doppler shift is going to be 1.0.
-  if (!(Context()->Listener()->Velocity().IsZero() && mVelocity.IsZero())) {
-    for(uint32_t i = 0; i < mSources.Length(); i++) {
-      mSources[i]->SendDopplerShiftToStream(ComputeDopplerShift());
-    }
-  }
-}
-
-
 } // namespace dom
 } // namespace mozilla

--- a/dom/media/webaudio/PannerNode.h
+++ b/dom/media/webaudio/PannerNode.h
@@ -100,30 +100,16 @@ public:
       return;
     }
     mOrientationX->SetValue(aX);
     mOrientationY->SetValue(aY);
     mOrientationZ->SetValue(aZ);
     SendThreeDPointParameterToStream(ORIENTATION, ConvertAudioParamTo3DP(mOrientationX, mOrientationY, mOrientationZ));
   }
 
-  void SetVelocity(double aX, double aY, double aZ)
-  {
-    if (WebAudioUtils::FuzzyEqual(mVelocity.x, aX) &&
-        WebAudioUtils::FuzzyEqual(mVelocity.y, aY) &&
-        WebAudioUtils::FuzzyEqual(mVelocity.z, aZ)) {
-      return;
-    }
-    mVelocity.x = aX;
-    mVelocity.y = aY;
-    mVelocity.z = aZ;
-    SendThreeDPointParameterToStream(VELOCITY, mVelocity);
-    SendDopplerToSourcesIfNeeded();
-  }
-
   double RefDistance() const
   {
     return mRefDistance;
   }
   void SetRefDistance(double aRefDistance)
   {
     if (WebAudioUtils::FuzzyEqual(mRefDistance, aRefDistance)) {
       return;
@@ -222,22 +208,16 @@ public:
     return mOrientationY;
   }
 
   AudioParam* OrientationZ()
   {
     return mOrientationZ;
   }
 
-
-  float ComputeDopplerShift();
-  void SendDopplerToSourcesIfNeeded();
-  void FindConnectedSources();
-  void FindConnectedSources(AudioNode* aNode, nsTArray<AudioBufferSourceNode*>& aSources, std::set<AudioNode*>& aSeenNodes);
-
   const char* NodeType() const override
   {
     return "PannerNode";
   }
 
   size_t SizeOfExcludingThis(MallocSizeOf aMallocSizeOf) const override;
   size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const override;
 
@@ -246,30 +226,26 @@ private:
   ~PannerNode();
 
   friend class AudioListener;
   friend class PannerNodeEngine;
   enum EngineParameters {
     LISTENER_POSITION,
     LISTENER_FRONT_VECTOR, // unit length
     LISTENER_RIGHT_VECTOR, // unit length, orthogonal to LISTENER_FRONT_VECTOR
-    LISTENER_VELOCITY,
-    LISTENER_DOPPLER_FACTOR,
-    LISTENER_SPEED_OF_SOUND,
     PANNING_MODEL,
     DISTANCE_MODEL,
     POSITION,
     POSITIONX,
     POSITIONY,
     POSITIONZ,
     ORIENTATION, // unit length or zero
     ORIENTATIONX,
     ORIENTATIONY,
     ORIENTATIONZ,
-    VELOCITY,
     REF_DISTANCE,
     MAX_DISTANCE,
     ROLLOFF_FACTOR,
     CONE_INNER_ANGLE,
     CONE_OUTER_ANGLE,
     CONE_OUTER_GAIN
   };
 
@@ -281,26 +257,21 @@ private:
   PanningModelType mPanningModel;
   DistanceModelType mDistanceModel;
   RefPtr<AudioParam> mPositionX;
   RefPtr<AudioParam> mPositionY;
   RefPtr<AudioParam> mPositionZ;
   RefPtr<AudioParam> mOrientationX;
   RefPtr<AudioParam> mOrientationY;
   RefPtr<AudioParam> mOrientationZ;
-  ThreeDPoint mVelocity;
 
   double mRefDistance;
   double mMaxDistance;
   double mRolloffFactor;
   double mConeInnerAngle;
   double mConeOuterAngle;
   double mConeOuterGain;
-
-  // An array of all the AudioBufferSourceNode connected directly or indirectly
-  // to this AudioPannerNode.
-  nsTArray<AudioBufferSourceNode*> mSources;
 };
 
 } // namespace dom
 } // namespace mozilla
 
 #endif

--- a/dom/webidl/AudioListener.webidl
+++ b/dom/webidl/AudioListener.webidl
@@ -7,25 +7,13 @@
  * https://webaudio.github.io/web-audio-api/
  *
  * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
  * liability, trademark and document use rules apply.
  */
 
 [Pref="dom.webaudio.enabled"]
 interface AudioListener {
-
-    // same as OpenAL (default 1)
-    [Deprecated="PannerNodeDoppler"]
-    attribute double dopplerFactor;
-
-    // in meters / second (default 343.3)
-    [Deprecated="PannerNodeDoppler"]
-    attribute double speedOfSound;
-
     // Uses a 3D cartesian coordinate system
     void setPosition(double x, double y, double z);
     void setOrientation(double x, double y, double z, double xUp, double yUp, double zUp);
-    [Deprecated="PannerNodeDoppler"]
-    void setVelocity(double x, double y, double z);
-
 };
 

--- a/dom/webidl/PannerNode.webidl
+++ b/dom/webidl/PannerNode.webidl
@@ -43,18 +43,16 @@ dictionary PannerOptions : AudioNodeOpti
 interface PannerNode : AudioNode {
 
     // Default for stereo is equalpower
     attribute PanningModelType panningModel;
 
     // Uses a 3D cartesian coordinate system
     void setPosition(double x, double y, double z);
     void setOrientation(double x, double y, double z);
-    [Deprecated="PannerNodeDoppler"]
-    void setVelocity(double x, double y, double z);
 
     // Cartesian coordinate for position
     readonly attribute AudioParam positionX;
     readonly attribute AudioParam positionY;
     readonly attribute AudioParam positionZ;
 
     // Cartesian coordinate for orientation
     readonly attribute AudioParam orientationX;