diff --git a/trunk/doc/CHANGELOG.md b/trunk/doc/CHANGELOG.md
index b1975172c..4c4372600 100644
--- a/trunk/doc/CHANGELOG.md
+++ b/trunk/doc/CHANGELOG.md
@@ -8,6 +8,7 @@ The changelog for SRS.
 
 ## SRS 4.0 Changelog
 
+* v4.0, 2022-11-22, Pick [#3079](https://github.com/ossrs/srs/issues/3079): WebRTC: Fix no audio and video issue for Firefox. v4.0.268
 * v4.0, 2022-10-10, For [#2901](https://github.com/ossrs/srs/issues/2901): Edge: Fast disconnect and reconnect. v4.0.267
 * v4.0, 2022-09-27, For [#3167](https://github.com/ossrs/srs/issues/3167): WebRTC: Refine sequence jitter algorithm. v4.0.266
 * v4.0, 2022-09-16, For [#3179](https://github.com/ossrs/srs/issues/3179): WebRTC: Make sure the same m-lines order for offer and answer. v4.0.265
diff --git a/trunk/src/app/srs_app_rtc_source.cpp b/trunk/src/app/srs_app_rtc_source.cpp
index 26e6ee69a..d8c1856a6 100644
--- a/trunk/src/app/srs_app_rtc_source.cpp
+++ b/trunk/src/app/srs_app_rtc_source.cpp
@@ -722,6 +722,8 @@ SrsRtcFromRtmpBridger::SrsRtcFromRtmpBridger(SrsRtcSource* source)
         if (!descs.empty()) {
             audio_ssrc = descs.at(0)->ssrc_;
         }
+        // Note we must use the PT of source, see https://github.com/ossrs/srs/pull/3079
+        audio_payload_type_ = descs.empty() ? kAudioPayloadType : descs.front()->media_->pt_;
     }
 
     // video track ssrc
@@ -730,6 +732,8 @@ SrsRtcFromRtmpBridger::SrsRtcFromRtmpBridger(SrsRtcSource* source)
         if (!descs.empty()) {
             video_ssrc = descs.at(0)->ssrc_;
         }
+        // Note we must use the PT of source, see https://github.com/ossrs/srs/pull/3079
+        video_payload_type_ = descs.empty() ? kVideoPayloadType : descs.front()->media_->pt_;
     }
 }
 
@@ -900,7 +904,7 @@ srs_error_t SrsRtcFromRtmpBridger::package_opus(SrsAudioFrame* audio, SrsRtpPack
 {
     srs_error_t err = srs_success;
 
-    pkt->header.set_payload_type(kAudioPayloadType);
+    pkt->header.set_payload_type(audio_payload_type_);
     pkt->header.set_ssrc(audio_ssrc);
     pkt->frame_type = SrsFrameTypeAudio;
     pkt->header.set_marker(true);
@@ -1044,7 +1048,7 @@ srs_error_t SrsRtcFromRtmpBridger::package_stap_a(SrsRtcSource* source, SrsShare
         return srs_error_new(ERROR_RTC_RTP_MUXER, "sps/pps empty");
     }
 
-    pkt->header.set_payload_type(kVideoPayloadType);
+    pkt->header.set_payload_type(video_payload_type_);
     pkt->header.set_ssrc(video_ssrc);
     pkt->frame_type = SrsFrameTypeVideo;
     pkt->nalu_type = (SrsAvcNaluType)kStapA;
@@ -1126,7 +1130,7 @@ srs_error_t SrsRtcFromRtmpBridger::package_nalus(SrsSharedPtrMessage* msg, const
         SrsRtpPacket* pkt = new SrsRtpPacket();
         pkts.push_back(pkt);
 
-        pkt->header.set_payload_type(kVideoPayloadType);
+        pkt->header.set_payload_type(video_payload_type_);
         pkt->header.set_ssrc(video_ssrc);
         pkt->frame_type = SrsFrameTypeVideo;
         pkt->nalu_type = (SrsAvcNaluType)first_nalu_type;
@@ -1160,7 +1164,7 @@ srs_error_t SrsRtcFromRtmpBridger::package_nalus(SrsSharedPtrMessage* msg, const
             SrsRtpPacket* pkt = new SrsRtpPacket();
             pkts.push_back(pkt);
 
-            pkt->header.set_payload_type(kVideoPayloadType);
+            pkt->header.set_payload_type(video_payload_type_);
             pkt->header.set_ssrc(video_ssrc);
             pkt->frame_type = SrsFrameTypeVideo;
             pkt->nalu_type = (SrsAvcNaluType)kFuA;
@@ -1190,7 +1194,7 @@ srs_error_t SrsRtcFromRtmpBridger::package_single_nalu(SrsSharedPtrMessage* msg,
     SrsRtpPacket* pkt = new SrsRtpPacket();
     pkts.push_back(pkt);
 
-    pkt->header.set_payload_type(kVideoPayloadType);
+    pkt->header.set_payload_type(video_payload_type_);
     pkt->header.set_ssrc(video_ssrc);
     pkt->frame_type = SrsFrameTypeVideo;
     pkt->header.set_sequence(video_sequence++);
@@ -1223,7 +1227,7 @@ srs_error_t SrsRtcFromRtmpBridger::package_fu_a(SrsSharedPtrMessage* msg, SrsSam
         SrsRtpPacket* pkt = new SrsRtpPacket();
         pkts.push_back(pkt);
 
-        pkt->header.set_payload_type(kVideoPayloadType);
+        pkt->header.set_payload_type(video_payload_type_);
         pkt->header.set_ssrc(video_ssrc);
         pkt->frame_type = SrsFrameTypeVideo;
         pkt->header.set_sequence(video_sequence++);
diff --git a/trunk/src/app/srs_app_rtc_source.hpp b/trunk/src/app/srs_app_rtc_source.hpp
index 90728c8f4..b21bbd053 100644
--- a/trunk/src/app/srs_app_rtc_source.hpp
+++ b/trunk/src/app/srs_app_rtc_source.hpp
@@ -261,6 +261,8 @@ private:
     uint16_t video_sequence;
     uint32_t audio_ssrc;
     uint32_t video_ssrc;
+    uint8_t audio_payload_type_;
+    uint8_t video_payload_type_;
 public:
     SrsRtcFromRtmpBridger(SrsRtcSource* source);
     virtual ~SrsRtcFromRtmpBridger();
diff --git a/trunk/src/core/srs_core_version4.hpp b/trunk/src/core/srs_core_version4.hpp
index 46076d8de..d26350ab1 100644
--- a/trunk/src/core/srs_core_version4.hpp
+++ b/trunk/src/core/srs_core_version4.hpp
@@ -9,6 +9,6 @@
 
 #define VERSION_MAJOR       4
 #define VERSION_MINOR       0
-#define VERSION_REVISION    267
+#define VERSION_REVISION    268
 
 #endif