diff --git a/firefox.spec b/firefox.spec
index eda3603..610a85f 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -1,9 +1,9 @@
 # Set to true if it's going to be submitted as update.
-%global release_build     0
+%global release_build     1
 %global debug_build       0
 %global build_with_clang  0
 %global build_with_asan   0
-%global run_firefox_tests 1
+%global run_firefox_tests 0
 %global create_debuginfo  1
 %global system_nss        1
 
@@ -125,7 +125,7 @@ ExcludeArch: aarch64
 Summary:        Mozilla Firefox Web browser
 Name:           firefox
 Version:        83.0
-Release:        9%{?pre_tag}%{?dist}
+Release:        10%{?pre_tag}%{?dist}
 URL:            https://www.mozilla.org/firefox/
 License:        MPLv1.1 or GPLv2+ or LGPLv2+
 Source0:        https://archive.mozilla.org/pub/firefox/releases/%{version}%{?pre_version}/source/firefox-%{version}%{?pre_version}.source.tar.xz
@@ -191,6 +191,7 @@ Patch416:        mozilla-1673202.patch
 Patch417:        mozilla-1673313.patch
 Patch418:        mozilla-1556931-s390x-hidden-syms.patch
 Patch419:        mozilla-1885133.patch
+Patch420:        mozilla-1678680.patch
 
 # Upstream patches from mozbz#1672944
 Patch450:        pw1.patch
@@ -420,6 +421,7 @@ This package contains results of tests executed during build.
 %patch453 -p1 -b .pw4
 %patch454 -p1 -b .pw5
 %patch455 -p1 -b .pw6
+%patch420 -p1 -b .1678680
 
 # VA-API fixes
 %patch584 -p1 -b .firefox-disable-ffvpx-with-vapi
@@ -996,6 +998,9 @@ gtk-update-icon-cache %{_datadir}/icons/hicolor &>/dev/null || :
 #---------------------------------------------------------------------
 
 %changelog
+* Sat Nov 28 2020 Martin Stransky <stransky@redhat.com> - 83.0-10
+- Added fix for mzbz#1678680
+
 * Wed Nov 25 2020 Martin Stransky <stransky@redhat.com> - 83.0-9
 - Added mochitest test files
 
diff --git a/mozilla-1678680.patch b/mozilla-1678680.patch
new file mode 100644
index 0000000..5c4953a
--- /dev/null
+++ b/mozilla-1678680.patch
@@ -0,0 +1,73 @@
+changeset:   560838:7a5a1784b5d1
+tag:         tip
+parent:      560835:7184fb5a42fb
+user:        Martin Stransky <stransky@redhat.com>
+date:        Fri Nov 27 17:29:07 2020 +0100
+files:       third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
+description:
+Bug 1678680 [PipeWire] Lock current_frame_ access as it can be used from multiple threads, r?dminor
+
+Differential Revision: https://phabricator.services.mozilla.com/D98080
+
+
+diff --git a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
+--- a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
++++ b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.cc
+@@ -396,16 +396,17 @@ void BaseCapturerPipeWire::HandleBuffer(
+   DesktopSize video_size_prev = video_size_;
+     if (video_metadata_use_) {
+     video_size_ = DesktopSize(video_metadata->region.size.width,
+                               video_metadata->region.size.height);
+   } else {
+     video_size_ = desktop_size_;
+   }
+ 
++  rtc::CritScope lock(&current_frame_lock_);
+   if (!current_frame_ ||
+       (video_metadata_use_ && !video_size_.equals(video_size_prev))) {
+     current_frame_ =
+       std::make_unique<uint8_t[]>
+         (video_size_.width() * video_size_.height() * kBytesPerPixel);
+   }
+ 
+   const int32_t dstStride = video_size_.width() * kBytesPerPixel;
+@@ -872,16 +873,17 @@ void BaseCapturerPipeWire::Start(Callbac
+ }
+ 
+ void BaseCapturerPipeWire::CaptureFrame() {
+   if (portal_init_failed_) {
+     callback_->OnCaptureResult(Result::ERROR_PERMANENT, nullptr);
+     return;
+   }
+ 
++  rtc::CritScope lock(&current_frame_lock_);
+   if (!current_frame_) {
+     callback_->OnCaptureResult(Result::ERROR_TEMPORARY, nullptr);
+     return;
+   }
+ 
+   DesktopSize frame_size = desktop_size_;
+   if (video_metadata_use_) {
+     frame_size = video_size_;
+diff --git a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
+--- a/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
++++ b/third_party/libwebrtc/webrtc/modules/desktop_capture/linux/base_capturer_pipewire.h
+@@ -79,16 +79,17 @@ class BaseCapturerPipeWire : public Desk
+   guint sources_request_signal_id_ = 0;
+   guint start_request_signal_id_ = 0;
+ 
+   bool video_metadata_use_ = false;
+   DesktopSize video_size_;
+   DesktopSize desktop_size_ = {};
+   DesktopCaptureOptions options_ = {};
+ 
++  rtc::CriticalSection current_frame_lock_;
+   std::unique_ptr<uint8_t[]> current_frame_;
+   Callback* callback_ = nullptr;
+ 
+   bool portal_init_failed_ = false;
+ 
+   void InitPortal();
+   void InitPipeWire();
+ 
+