diff --git a/media/webrtc/signaling/src/jsep/JsepSessionImpl.cpp b/media/webrtc/signaling/src/jsep/JsepSessionImpl.cpp
index 65350f7cef7a..1fb76a4c694e 100644
--- a/media/webrtc/signaling/src/jsep/JsepSessionImpl.cpp
+++ b/media/webrtc/signaling/src/jsep/JsepSessionImpl.cpp
@@ -18,12 +18,14 @@
 
 #include "mozilla/Move.h"
 #include "mozilla/UniquePtr.h"
+#include "mozilla/Preferences.h"
 #include "mozilla/Telemetry.h"
 
 #include "webrtc/config.h"
 
 #include "signaling/src/jsep/JsepTrack.h"
 #include "signaling/src/jsep/JsepTransport.h"
+#include "signaling/src/sdp/RsdparsaSdpParser.h"
 #include "signaling/src/sdp/Sdp.h"
 #include "signaling/src/sdp/SipccSdp.h"
 #include "signaling/src/sdp/SipccSdpParser.h"
@@ -65,6 +67,8 @@ JsepSessionImpl::Init()
   SetupDefaultCodecs();
   SetupDefaultRtpExtensions();
 
+  mRunRustParser = Preferences::GetBool("media.webrtc.rsdparsa_enabled", false);
+
   return NS_OK;
 }
 
@@ -1259,10 +1263,13 @@ JsepSessionImpl::CopyPreviousMsid(const Sdp& oldLocal, Sdp* newLocal)
 nsresult
 JsepSessionImpl::ParseSdp(const std::string& sdp, UniquePtr<Sdp>* parsedp)
 {
-  UniquePtr<Sdp> parsed = mParser.Parse(sdp);
+  UniquePtr<Sdp> parsed = mSipccParser.Parse(sdp);
+  if (mRunRustParser) {
+    UniquePtr<Sdp> rustParsed = mRsdparsaParser.Parse(sdp);
+  }
   if (!parsed) {
     std::string error = "Failed to parse SDP: ";
-    mSdpHelper.appendSdpParseErrors(mParser.GetParseErrors(), &error);
+    mSdpHelper.appendSdpParseErrors(mSipccParser.GetParseErrors(), &error);
     JSEP_SET_ERROR(error);
     return NS_ERROR_INVALID_ARG;
   }
diff --git a/media/webrtc/signaling/src/jsep/JsepSessionImpl.h b/media/webrtc/signaling/src/jsep/JsepSessionImpl.h
index 15fcbde09769..d9148d66c873 100644
--- a/media/webrtc/signaling/src/jsep/JsepSessionImpl.h
+++ b/media/webrtc/signaling/src/jsep/JsepSessionImpl.h
@@ -14,6 +14,7 @@
 #include "signaling/src/jsep/JsepTrack.h"
 #include "signaling/src/jsep/JsepTransceiver.h"
 #include "signaling/src/jsep/SsrcGenerator.h"
+#include "signaling/src/sdp/RsdparsaSdpParser.h"
 #include "signaling/src/sdp/SipccSdpParser.h"
 #include "signaling/src/sdp/SdpHelper.h"
 #include "signaling/src/common/PtrVector.h"
@@ -283,9 +284,11 @@ private:
   UniquePtr<Sdp> mPendingRemoteDescription;
   PtrVector<JsepCodecDescription> mSupportedCodecs;
   std::string mLastError;
-  SipccSdpParser mParser;
+  SipccSdpParser mSipccParser;
   SdpHelper mSdpHelper;
   SsrcGenerator mSsrcGenerator;
+  bool mRunRustParser;
+  RsdparsaSdpParser mRsdparsaParser;
 };
 
 } // namespace mozilla
diff --git a/media/webrtc/signaling/src/sdp/SdpHelper.cpp b/media/webrtc/signaling/src/sdp/SdpHelper.cpp
index 011dc30c7b98..f9714ff65854 100644
--- a/media/webrtc/signaling/src/sdp/SdpHelper.cpp
+++ b/media/webrtc/signaling/src/sdp/SdpHelper.cpp
@@ -819,6 +819,66 @@ SdpHelper::GetMsectionBundleType(const Sdp& sdp,
   return kNoBundle;
 }
 
+static bool
+AttributeListMatch(const SdpAttributeList& list1, const SdpAttributeList& list2)
+{
+  // TODO: Consider adding telemetry in this function to record which
+  // attributes don't match. See Bug 1432955.
+  for (int i = SdpAttribute::kFirstAttribute; i <= SdpAttribute::kLastAttribute; i++) {
+    auto attributeType = static_cast<SdpAttribute::AttributeType>(i);
+    // TODO: We should do more thorough checking here, e.g. serialize and
+    // compare strings. See Bug 1439690.
+    if (list1.HasAttribute(attributeType, false) !=
+        list2.HasAttribute(attributeType, false)) {
+      return false;
+    }
+  }
+  return true;
+}
+
+static bool
+MediaSectionMatch(const SdpMediaSection& mediaSection1,
+                  const SdpMediaSection& mediaSection2)
+{
+  // TODO: We should do more thorough checking in this function.
+  // See Bug 1439690.
+  if (!AttributeListMatch(mediaSection1.GetAttributeList(),
+			  mediaSection2.GetAttributeList())) {
+    return false;
+  }
+  if (mediaSection1.GetPort() != mediaSection2.GetPort()) {
+    return false;
+  }
+  const std::vector<std::string>& formats1 = mediaSection1.GetFormats();
+  const std::vector<std::string>& formats2 = mediaSection2.GetFormats();
+  auto formats1Set = std::set<std::string>(formats1.begin(), formats1.end());
+  auto formats2Set = std::set<std::string>(formats2.begin(), formats2.end());
+  if (formats1Set != formats2Set) {
+    return false;
+  }
+  return true;
+}
+
+bool
+SdpHelper::SdpMatch(const Sdp& sdp1, const Sdp& sdp2)
+{
+  if (sdp1.GetMediaSectionCount() != sdp2.GetMediaSectionCount()) {
+    return false;
+  }
+  if (!AttributeListMatch(sdp1.GetAttributeList(), sdp2.GetAttributeList())) {
+    return false;
+  }
+  for (size_t i = 0; i < sdp1.GetMediaSectionCount(); i++) {
+    const SdpMediaSection& mediaSection1 = sdp1.GetMediaSection(i);
+    const SdpMediaSection& mediaSection2 = sdp2.GetMediaSection(i);
+    if (!MediaSectionMatch(mediaSection1, mediaSection2)) {
+      return false;
+    }
+  }
+
+  return true;
+}
+
 } // namespace mozilla
 
 
diff --git a/media/webrtc/signaling/src/sdp/SdpHelper.h b/media/webrtc/signaling/src/sdp/SdpHelper.h
index 60b1218df9ae..ba5bb20c3b40 100644
--- a/media/webrtc/signaling/src/sdp/SdpHelper.h
+++ b/media/webrtc/signaling/src/sdp/SdpHelper.h
@@ -120,6 +120,8 @@ class SdpHelper {
         const std::vector<SdpExtmapAttributeList::Extmap>& localExtensions,
         SdpMediaSection* localMsection);
 
+    bool SdpMatch(const Sdp& sdp1, const Sdp& sdp2);
+
   private:
     std::string& mLastError;