diff --git a/content/html/content/public/HTMLAudioElement.h b/content/html/content/public/HTMLAudioElement.h
index 7f9cc434b547..68509e4db5f6 100644
--- a/content/html/content/public/HTMLAudioElement.h
+++ b/content/html/content/public/HTMLAudioElement.h
@@ -7,8 +7,8 @@
 #define mozilla_dom_HTMLAudioElement_h
 
 #include "nsIDOMHTMLAudioElement.h"
-#include "nsIJSNativeInitializer.h"
 #include "mozilla/dom/HTMLMediaElement.h"
+#include "mozilla/dom/TypedArray.h"
 
 typedef uint16_t nsMediaNetworkState;
 typedef uint16_t nsMediaReadyState;
@@ -39,9 +39,6 @@ public:
   using HTMLMediaElement::GetPaused;
   NS_FORWARD_NSIDOMHTMLMEDIAELEMENT(HTMLMediaElement::)
 
-  // nsIDOMHTMLAudioElement
-  NS_DECL_NSIDOMHTMLAUDIOELEMENT
-
   virtual nsresult Clone(nsINodeInfo *aNodeInfo, nsINode **aResult) const;
   virtual nsresult SetAcceptHeader(nsIHttpChannel* aChannel);
 
@@ -57,7 +54,16 @@ public:
 
   void MozSetup(uint32_t aChannels, uint32_t aRate, ErrorResult& aRv);
 
-  uint32_t MozWriteAudio(JSContext* aCx, JS::Value aData, ErrorResult& aRv);
+  uint32_t MozWriteAudio(const Float32Array& aData, ErrorResult& aRv)
+  {
+    return MozWriteAudio(aData.Data(), aData.Length(), aRv);
+  }
+  uint32_t MozWriteAudio(const Sequence<float>& aData, ErrorResult& aRv)
+  {
+    return MozWriteAudio(aData.Elements(), aData.Length(), aRv);
+  }
+  uint32_t MozWriteAudio(const float* aData, uint32_t aLength,
+                         ErrorResult& aRv);
 
   uint64_t MozCurrentSampleOffset(ErrorResult& aRv);
 
diff --git a/content/html/content/src/HTMLAudioElement.cpp b/content/html/content/src/HTMLAudioElement.cpp
index 7e8bacbd647d..eb4ba8eaf7b8 100644
--- a/content/html/content/src/HTMLAudioElement.cpp
+++ b/content/html/content/src/HTMLAudioElement.cpp
@@ -130,16 +130,9 @@ HTMLAudioElement::MozSetup(uint32_t aChannels, uint32_t aRate, ErrorResult& aRv)
   mAudioStream->SetVolume(mVolume);
 }
 
-NS_IMETHODIMP
-HTMLAudioElement::MozSetup(uint32_t aChannels, uint32_t aRate)
-{
-  ErrorResult rv;
-  MozSetup(aChannels, aRate, rv);
-  return rv.ErrorCode();
-}
-
 uint32_t
-HTMLAudioElement::MozWriteAudio(JSContext* aCx, JS::Value aData, ErrorResult& aRv)
+HTMLAudioElement::MozWriteAudio(const float* aData, uint32_t aLength,
+                                ErrorResult& aRv)
 {
   if (!IsAudioAPIEnabled()) {
     aRv.Throw(NS_ERROR_DOM_NOT_SUPPORTED_ERR);
@@ -151,50 +144,22 @@ HTMLAudioElement::MozWriteAudio(JSContext* aCx, JS::Value aData, ErrorResult& aR
     return 0;
   }
 
-  if (!aData.isObject()) {
-    aRv.Throw(NS_ERROR_DOM_TYPE_MISMATCH_ERR);
-    return 0;
-  }
-
-  JSObject* darray = &aData.toObject();
-  JS::AutoObjectRooter tvr(aCx);
-  JSObject* tsrc = nullptr;
-
-  // Allow either Float32Array or plain JS Array
-  if (JS_IsFloat32Array(darray)) {
-    tsrc = darray;
-  } else if (JS_IsArrayObject(aCx, darray)) {
-    JSObject* nobj = JS_NewFloat32ArrayFromArray(aCx, darray);
-    if (!nobj) {
-      aRv.Throw(NS_ERROR_DOM_TYPE_MISMATCH_ERR);
-      return 0;
-    }
-    tsrc = nobj;
-  } else {
-    aRv.Throw(NS_ERROR_DOM_TYPE_MISMATCH_ERR);
-    return 0;
-  }
-  tvr.setObject(tsrc);
-
-  uint32_t dataLength = JS_GetTypedArrayLength(tsrc);
-
   // Make sure that we are going to write the correct amount of data based
   // on number of channels.
-  if (dataLength % mChannels != 0) {
+  if (aLength % mChannels != 0) {
     aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
     return 0;
   }
 
   // Don't write more than can be written without blocking.
-  uint32_t writeLen = std::min(mAudioStream->Available(), dataLength / mChannels);
+  uint32_t writeLen = std::min(mAudioStream->Available(), aLength / mChannels);
 
-  float* frames = JS_GetFloat32ArrayData(tsrc);
   // Convert the samples back to integers as we are using fixed point audio in
   // the AudioStream.
   // This could be optimized to avoid allocation and memcpy when
   // AudioDataValue is 'float', but it's not worth it for this deprecated API.
   nsAutoArrayPtr<AudioDataValue> audioData(new AudioDataValue[writeLen * mChannels]);
-  ConvertAudioSamples(frames, audioData.get(), writeLen * mChannels);
+  ConvertAudioSamples(aData, audioData.get(), writeLen * mChannels);
   aRv = mAudioStream->Write(audioData.get(), writeLen);
   if (aRv.Failed()) {
     return 0;
@@ -205,14 +170,6 @@ HTMLAudioElement::MozWriteAudio(JSContext* aCx, JS::Value aData, ErrorResult& aR
   return writeLen * mChannels;
 }
 
-NS_IMETHODIMP
-HTMLAudioElement::MozWriteAudio(const JS::Value& aData, JSContext* aCx, uint32_t* aRetVal)
-{
-  ErrorResult rv;
-  *aRetVal = MozWriteAudio(aCx, aData, rv);
-  return rv.ErrorCode();
-}
-
 uint64_t
 HTMLAudioElement::MozCurrentSampleOffset(ErrorResult& aRv)
 {
@@ -234,14 +191,6 @@ HTMLAudioElement::MozCurrentSampleOffset(ErrorResult& aRv)
   return position * mChannels;
 }
 
-NS_IMETHODIMP
-HTMLAudioElement::MozCurrentSampleOffset(uint64_t *aRetVal)
-{
-  ErrorResult rv;
-  *aRetVal = MozCurrentSampleOffset(rv);
-  return rv.ErrorCode();
-}
-
 nsresult HTMLAudioElement::SetAcceptHeader(nsIHttpChannel* aChannel)
 {
     nsAutoCString value(
diff --git a/dom/interfaces/html/nsIDOMHTMLAudioElement.idl b/dom/interfaces/html/nsIDOMHTMLAudioElement.idl
index 4c057f22573a..198dfba444cd 100644
--- a/dom/interfaces/html/nsIDOMHTMLAudioElement.idl
+++ b/dom/interfaces/html/nsIDOMHTMLAudioElement.idl
@@ -6,10 +6,6 @@
 
 #include "nsIDOMHTMLMediaElement.idl"
 
-%{C++
-#include "jsapi.h"
-%}
-
 /**
  * The nsIDOMHTMLAudioElement interface is the interface to a HTML
  * <audio> element.
@@ -20,17 +16,7 @@
  * @status UNDER_DEVELOPMENT
  */
 
-[scriptable, uuid(8e3fb6a1-490d-4772-90fd-3e3763958b74)]
+[scriptable, uuid(873848fe-d756-4c1b-8cf0-697f08082d85)]
 interface nsIDOMHTMLAudioElement : nsIDOMHTMLMediaElement
 {
-  // Setup the audio stream for writing
-  void mozSetup(in uint32_t channels, in uint32_t rate);
-
-  // Write audio to the audio stream
-  [implicit_jscontext]
-  unsigned long mozWriteAudio(in jsval data);
-
-  // Get the current offset (measured in samples since the start) of the audio
-  // stream created using mozWriteAudio().
-  unsigned long long mozCurrentSampleOffset();
 };
diff --git a/dom/webidl/HTMLAudioElement.webidl b/dom/webidl/HTMLAudioElement.webidl
index a9fd56d329a4..6da9b40fb74a 100644
--- a/dom/webidl/HTMLAudioElement.webidl
+++ b/dom/webidl/HTMLAudioElement.webidl
@@ -18,15 +18,17 @@ interface HTMLAudioElement : HTMLMediaElement {};
 partial interface HTMLAudioElement
 {
   // Setup the audio stream for writing
-  [Throws]
+  [Pref="media.audio_data.enabled", Throws]
   void mozSetup(unsigned long channels, unsigned long rate);
 
   // Write audio to the audio stream
-  [Throws]
-  unsigned long mozWriteAudio(any data);
+  [Pref="media.audio_data.enabled", Throws]
+  unsigned long mozWriteAudio(Float32Array data);
+  [Pref="media.audio_data.enabled", Throws]
+  unsigned long mozWriteAudio(sequence<unrestricted float> data);
 
   // Get the current offset (measured in samples since the start) of the audio
   // stream created using mozWriteAudio().
-  [Throws]
+  [Pref="media.audio_data.enabled", Throws]
   unsigned long long mozCurrentSampleOffset();
 };