diff --git a/dom/media/webaudio/AudioBufferSourceNode.cpp b/dom/media/webaudio/AudioBufferSourceNode.cpp
index 1b0d43cb1bb..3a09d4152d4 100644
--- a/dom/media/webaudio/AudioBufferSourceNode.cpp
+++ b/dom/media/webaudio/AudioBufferSourceNode.cpp
@@ -558,8 +558,8 @@ AudioBufferSourceNode::AudioBufferSourceNode(AudioContext* aContext)
   , mLoopStart(0.0)
   , mLoopEnd(0.0)
   // mOffset and mDuration are initialized in Start().
-  , mPlaybackRate(new AudioParam(this, SendPlaybackRateToStream, 1.0f))
-  , mDetune(new AudioParam(this, SendDetuneToStream, 0.0f))
+  , mPlaybackRate(new AudioParam(this, SendPlaybackRateToStream, 1.0f, "playbackRate"))
+  , mDetune(new AudioParam(this, SendDetuneToStream, 0.0f, "detune"))
   , mLoop(false)
   , mStartCalled(false)
   , mStopped(false)
diff --git a/dom/media/webaudio/AudioParam.cpp b/dom/media/webaudio/AudioParam.cpp
index 8aea9040298..10ed9302558 100644
--- a/dom/media/webaudio/AudioParam.cpp
+++ b/dom/media/webaudio/AudioParam.cpp
@@ -45,11 +45,13 @@ NS_IMPL_CYCLE_COLLECTION_UNROOT_NATIVE(AudioParam, Release)
 
 AudioParam::AudioParam(AudioNode* aNode,
                        AudioParam::CallbackType aCallback,
-                       float aDefaultValue)
+                       float aDefaultValue,
+                       const char* aName)
   : AudioParamTimeline(aDefaultValue)
   , mNode(aNode)
   , mCallback(aCallback)
   , mDefaultValue(aDefaultValue)
+  , mName(aName)
 {
 }
 
diff --git a/dom/media/webaudio/AudioParam.h b/dom/media/webaudio/AudioParam.h
index 2e5b6f5c1d3..4b153121e34 100644
--- a/dom/media/webaudio/AudioParam.h
+++ b/dom/media/webaudio/AudioParam.h
@@ -30,7 +30,8 @@ public:
 
   AudioParam(AudioNode* aNode,
              CallbackType aCallback,
-             float aDefaultValue);
+             float aDefaultValue,
+             const char* aName);
 
   NS_IMETHOD_(MozExternalRefCountType) AddRef(void);
   NS_IMETHOD_(MozExternalRefCountType) Release(void);
@@ -121,6 +122,16 @@ public:
     mCallback(mNode);
   }
 
+  uint32_t ParentNodeId()
+  {
+    return mNode->Id();
+  }
+
+  void GetName(nsAString& aName)
+  {
+    aName.AssignASCII(mName);
+  }
+
   float DefaultValue() const
   {
     return mDefaultValue;
@@ -183,6 +194,7 @@ private:
   nsTArray<AudioNode::InputNode> mInputNodes;
   CallbackType mCallback;
   const float mDefaultValue;
+  const char* mName;
   // The input port used to connect the AudioParam's stream to its node's stream
   nsRefPtr<MediaInputPort> mNodeStreamPort;
 };
diff --git a/dom/media/webaudio/BiquadFilterNode.cpp b/dom/media/webaudio/BiquadFilterNode.cpp
index 3e6341a9d7d..3b9ca2fbb23 100644
--- a/dom/media/webaudio/BiquadFilterNode.cpp
+++ b/dom/media/webaudio/BiquadFilterNode.cpp
@@ -244,10 +244,10 @@ BiquadFilterNode::BiquadFilterNode(AudioContext* aContext)
               ChannelCountMode::Max,
               ChannelInterpretation::Speakers)
   , mType(BiquadFilterType::Lowpass)
-  , mFrequency(new AudioParam(this, SendFrequencyToStream, 350.f))
-  , mDetune(new AudioParam(this, SendDetuneToStream, 0.f))
-  , mQ(new AudioParam(this, SendQToStream, 1.f))
-  , mGain(new AudioParam(this, SendGainToStream, 0.f))
+  , mFrequency(new AudioParam(this, SendFrequencyToStream, 350.f, "frequency"))
+  , mDetune(new AudioParam(this, SendDetuneToStream, 0.f, "detune"))
+  , mQ(new AudioParam(this, SendQToStream, 1.f, "Q"))
+  , mGain(new AudioParam(this, SendGainToStream, 0.f, "gain"))
 {
   BiquadFilterNodeEngine* engine = new BiquadFilterNodeEngine(this, aContext->Destination());
   mStream = aContext->Graph()->CreateAudioNodeStream(engine, MediaStreamGraph::INTERNAL_STREAM);
diff --git a/dom/media/webaudio/DelayNode.cpp b/dom/media/webaudio/DelayNode.cpp
index 76b71203e38..b983a84c481 100644
--- a/dom/media/webaudio/DelayNode.cpp
+++ b/dom/media/webaudio/DelayNode.cpp
@@ -190,7 +190,7 @@ DelayNode::DelayNode(AudioContext* aContext, double aMaxDelay)
               2,
               ChannelCountMode::Max,
               ChannelInterpretation::Speakers)
-  , mDelay(new AudioParam(this, SendDelayToStream, 0.0f))
+  , mDelay(new AudioParam(this, SendDelayToStream, 0.0f, "delayTime"))
 {
   DelayNodeEngine* engine =
     new DelayNodeEngine(this, aContext->Destination(),
diff --git a/dom/media/webaudio/DynamicsCompressorNode.cpp b/dom/media/webaudio/DynamicsCompressorNode.cpp
index 5cc6fbd2c60..a6b874f5bdc 100644
--- a/dom/media/webaudio/DynamicsCompressorNode.cpp
+++ b/dom/media/webaudio/DynamicsCompressorNode.cpp
@@ -201,12 +201,12 @@ DynamicsCompressorNode::DynamicsCompressorNode(AudioContext* aContext)
               2,
               ChannelCountMode::Explicit,
               ChannelInterpretation::Speakers)
-  , mThreshold(new AudioParam(this, SendThresholdToStream, -24.f))
-  , mKnee(new AudioParam(this, SendKneeToStream, 30.f))
-  , mRatio(new AudioParam(this, SendRatioToStream, 12.f))
+  , mThreshold(new AudioParam(this, SendThresholdToStream, -24.f, "threshold"))
+  , mKnee(new AudioParam(this, SendKneeToStream, 30.f, "knee"))
+  , mRatio(new AudioParam(this, SendRatioToStream, 12.f, "ratio"))
   , mReduction(0)
-  , mAttack(new AudioParam(this, SendAttackToStream, 0.003f))
-  , mRelease(new AudioParam(this, SendReleaseToStream, 0.25f))
+  , mAttack(new AudioParam(this, SendAttackToStream, 0.003f, "attack"))
+  , mRelease(new AudioParam(this, SendReleaseToStream, 0.25f, "release"))
 {
   DynamicsCompressorNodeEngine* engine = new DynamicsCompressorNodeEngine(this, aContext->Destination());
   mStream = aContext->Graph()->CreateAudioNodeStream(engine, MediaStreamGraph::INTERNAL_STREAM);
diff --git a/dom/media/webaudio/GainNode.cpp b/dom/media/webaudio/GainNode.cpp
index 729f9619f97..bf685f1cfad 100644
--- a/dom/media/webaudio/GainNode.cpp
+++ b/dom/media/webaudio/GainNode.cpp
@@ -125,7 +125,7 @@ GainNode::GainNode(AudioContext* aContext)
               2,
               ChannelCountMode::Max,
               ChannelInterpretation::Speakers)
-  , mGain(new AudioParam(this, SendGainToStream, 1.0f))
+  , mGain(new AudioParam(this, SendGainToStream, 1.0f, "gain"))
 {
   GainNodeEngine* engine = new GainNodeEngine(this, aContext->Destination());
   mStream = aContext->Graph()->CreateAudioNodeStream(engine, MediaStreamGraph::INTERNAL_STREAM);
diff --git a/dom/media/webaudio/OscillatorNode.cpp b/dom/media/webaudio/OscillatorNode.cpp
index c101ba7c33a..e800c6d6520 100644
--- a/dom/media/webaudio/OscillatorNode.cpp
+++ b/dom/media/webaudio/OscillatorNode.cpp
@@ -381,8 +381,8 @@ OscillatorNode::OscillatorNode(AudioContext* aContext)
               ChannelCountMode::Max,
               ChannelInterpretation::Speakers)
   , mType(OscillatorType::Sine)
-  , mFrequency(new AudioParam(this, SendFrequencyToStream, 440.0f))
-  , mDetune(new AudioParam(this, SendDetuneToStream, 0.0f))
+  , mFrequency(new AudioParam(this, SendFrequencyToStream, 440.0f, "frequency"))
+  , mDetune(new AudioParam(this, SendDetuneToStream, 0.0f, "detune"))
   , mStartCalled(false)
   , mStopped(false)
 {
diff --git a/dom/media/webaudio/StereoPannerNode.cpp b/dom/media/webaudio/StereoPannerNode.cpp
index 3b00d41b0c7..41725160746 100644
--- a/dom/media/webaudio/StereoPannerNode.cpp
+++ b/dom/media/webaudio/StereoPannerNode.cpp
@@ -176,7 +176,7 @@ StereoPannerNode::StereoPannerNode(AudioContext* aContext)
               2,
               ChannelCountMode::Clamped_max,
               ChannelInterpretation::Speakers)
-  , mPan(new AudioParam(this, SendPanToStream, 0.f))
+  , mPan(new AudioParam(this, SendPanToStream, 0.f, "pan"))
 {
   StereoPannerNodeEngine* engine = new StereoPannerNodeEngine(this, aContext->Destination());
   mStream = aContext->Graph()->CreateAudioNodeStream(engine,
diff --git a/dom/media/webaudio/test/chrome.ini b/dom/media/webaudio/test/chrome.ini
index 4de3332be8b..035b1a405c3 100644
--- a/dom/media/webaudio/test/chrome.ini
+++ b/dom/media/webaudio/test/chrome.ini
@@ -2,3 +2,4 @@
 skip-if = buildapp == 'b2g'
 
 [test_AudioNodeDevtoolsAPI.html]
+[test_AudioParamDevtoolsAPI.html]
diff --git a/dom/media/webaudio/test/test_AudioParamDevtoolsAPI.html b/dom/media/webaudio/test/test_AudioParamDevtoolsAPI.html
new file mode 100644
index 00000000000..f859277307e
--- /dev/null
+++ b/dom/media/webaudio/test/test_AudioParamDevtoolsAPI.html
@@ -0,0 +1,48 @@
+<!DOCTYPE HTML>
+<html>
+<head>
+  <title>Test the devtool AudioParam API</title>
+  <script type="text/javascript" src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
+  <link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css" />
+</head>
+<body>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+
+  Components.utils.import('resource://gre/modules/Services.jsm');
+
+  function checkIdAndName(node, name) {
+    is(node.id, node[name].parentNodeId, "The parent id should be correct");
+    is(node[name].name, name, "The name of the AudioParam should be correct.");
+  }
+
+  var ac = new AudioContext(),
+      gain = ac.createGain(),
+      osc = ac.createOscillator(),
+      del = ac.createDelay(),
+      source = ac.createBufferSource(),
+      stereoPanner = ac.createStereoPanner(),
+      comp = ac.createDynamicsCompressor(),
+      biquad = ac.createBiquadFilter();
+
+  checkIdAndName(gain, "gain");
+  checkIdAndName(osc, "frequency");
+  checkIdAndName(osc, "detune");
+  checkIdAndName(del, "delayTime");
+  checkIdAndName(source, "playbackRate");
+  checkIdAndName(source, "detune");
+  checkIdAndName(stereoPanner, "pan");
+  checkIdAndName(comp, "threshold");
+  checkIdAndName(comp, "knee");
+  checkIdAndName(comp, "ratio");
+  checkIdAndName(comp, "attack");
+  checkIdAndName(comp, "release");
+  checkIdAndName(biquad, "frequency");
+  checkIdAndName(biquad, "detune");
+  checkIdAndName(biquad, "Q");
+  checkIdAndName(biquad, "gain");
+
+</script>
+</pre>
+</body>
+</html>
diff --git a/dom/webidl/AudioParam.webidl b/dom/webidl/AudioParam.webidl
index 375ab62791c..e5b53a2dc50 100644
--- a/dom/webidl/AudioParam.webidl
+++ b/dom/webidl/AudioParam.webidl
@@ -37,3 +37,13 @@ interface AudioParam {
     void cancelScheduledValues(double startTime);
 
 };
+
+// Mozilla extension
+partial interface AudioParam {
+  // The ID of the AudioNode this AudioParam belongs to.
+  [ChromeOnly]
+  readonly attribute unsigned long parentNodeId;
+  // The name of the AudioParam
+  [ChromeOnly]
+  readonly attribute DOMString name;
+};