diff --git a/browser_patches/firefox/BUILD_NUMBER b/browser_patches/firefox/BUILD_NUMBER
index d391eb1213..ab823b015d 100644
--- a/browser_patches/firefox/BUILD_NUMBER
+++ b/browser_patches/firefox/BUILD_NUMBER
@@ -1,2 +1,2 @@
-1141
-Changed: joel.einbinder@gmail.com Fri 24 Jul 2020 03:10:49 PM PDT
+1142
+Changed: yurys@chromium.org Mon Jul 27 16:21:29 PDT 2020
diff --git a/browser_patches/firefox/juggler/screencast/nsScreencastService.cpp b/browser_patches/firefox/juggler/screencast/nsScreencastService.cpp
index 6889d8b380..c30aa4c7e4 100644
--- a/browser_patches/firefox/juggler/screencast/nsScreencastService.cpp
+++ b/browser_patches/firefox/juggler/screencast/nsScreencastService.cpp
@@ -46,7 +46,8 @@ rtc::scoped_refptr<webrtc::VideoCaptureModule> CreateWindowCapturer(nsIWidget* w
   }
   nsCString windowId;
   windowId.AppendPrintf("%" PRIuPTR, rawWindowId);
-  return webrtc::DesktopCaptureImpl::Create(sessionId, windowId.get(), webrtc::CaptureDeviceType::Window);
+  bool captureCursor = false;
+  return webrtc::DesktopCaptureImpl::Create(sessionId, windowId.get(), webrtc::CaptureDeviceType::Window, captureCursor);
 }
 
 void NotifyScreencastStopped(int32_t sessionId) {
diff --git a/browser_patches/firefox/patches/bootstrap.diff b/browser_patches/firefox/patches/bootstrap.diff
index fe73f6ac9b..1c88c3ae68 100644
--- a/browser_patches/firefox/patches/bootstrap.diff
+++ b/browser_patches/firefox/patches/bootstrap.diff
@@ -928,6 +928,98 @@ index 2b17323d8a939a18a788d34367a8c427740c0f17..b4764f1c0406b4f93b6936b32104f3de
  NS_IMETHODIMP BrowserChild::OnProgressChange(nsIWebProgress* aWebProgress,
                                               nsIRequest* aRequest,
                                               int32_t aCurSelfProgress,
+diff --git a/dom/media/systemservices/video_engine/desktop_capture_impl.cc b/dom/media/systemservices/video_engine/desktop_capture_impl.cc
+index 6fdb72a8ec50fecc9895911a4ee7ccbccb441c61..229aa455da74950ff601378b88e12bf7425b89e7 100644
+--- a/dom/media/systemservices/video_engine/desktop_capture_impl.cc
++++ b/dom/media/systemservices/video_engine/desktop_capture_impl.cc
+@@ -211,8 +211,9 @@ int32_t AppDeviceInfoImpl::GetOrientation(const char* deviceUniqueIdUTF8,
+ 
+ VideoCaptureModule* DesktopCaptureImpl::Create(const int32_t id,
+                                                const char* uniqueId,
+-                                               const CaptureDeviceType type) {
+-  return new rtc::RefCountedObject<DesktopCaptureImpl>(id, uniqueId, type);
++                                               const CaptureDeviceType type,
++                                               bool captureCursor) {
++  return new rtc::RefCountedObject<DesktopCaptureImpl>(id, uniqueId, type, captureCursor);
+ }
+ 
+ int32_t WindowDeviceInfoImpl::Init() {
+@@ -358,19 +359,24 @@ int32_t DesktopCaptureImpl::Init() {
+     DesktopCapturer::SourceId sourceId = atoi(_deviceUniqueId.c_str());
+     pWindowCapturer->SelectSource(sourceId);
+ 
+-    MouseCursorMonitor* pMouseCursorMonitor =
+-        MouseCursorMonitor::CreateForWindow(
+-            webrtc::DesktopCaptureOptions::CreateDefault(), sourceId);
+-    desktop_capturer_cursor_composer_ =
+-        std::unique_ptr<DesktopAndCursorComposer>(new DesktopAndCursorComposer(
+-            pWindowCapturer.release(), pMouseCursorMonitor));
++    if (capture_cursor_) {
++      MouseCursorMonitor* pMouseCursorMonitor =
++          MouseCursorMonitor::CreateForWindow(
++              webrtc::DesktopCaptureOptions::CreateDefault(), sourceId);
++      desktop_capturer_cursor_composer_ =
++          std::unique_ptr<DesktopAndCursorComposer>(new DesktopAndCursorComposer(
++              pWindowCapturer.release(), pMouseCursorMonitor));
++    } else {
++      desktop_capturer_cursor_composer_ = std::move(pWindowCapturer);
++    }
+   }
+ 
+   return 0;
+ }
+ 
+ DesktopCaptureImpl::DesktopCaptureImpl(const int32_t id, const char* uniqueId,
+-                                       const CaptureDeviceType type)
++                                       const CaptureDeviceType type,
++                                       bool captureCursor)
+     : _id(id),
+       _deviceUniqueId(uniqueId),
+       _deviceType(type),
+@@ -381,6 +387,7 @@ DesktopCaptureImpl::DesktopCaptureImpl(const int32_t id, const char* uniqueId,
+       delta_ntp_internal_ms_(
+           Clock::GetRealTimeClock()->CurrentNtpInMilliseconds() -
+           last_capture_time_),
++      capture_cursor_(captureCursor),
+       time_event_(EventWrapper::Create()),
+ #if defined(_WIN32)
+       capturer_thread_(
+diff --git a/dom/media/systemservices/video_engine/desktop_capture_impl.h b/dom/media/systemservices/video_engine/desktop_capture_impl.h
+index 4270926fbb83664427574d26982a8561cab8bec3..24859f58c3d4f018684106223eea32a28226302b 100644
+--- a/dom/media/systemservices/video_engine/desktop_capture_impl.h
++++ b/dom/media/systemservices/video_engine/desktop_capture_impl.h
+@@ -159,7 +159,8 @@ class DesktopCaptureImpl : public DesktopCapturer::Callback,
+   /* Create a screen capture modules object
+    */
+   static VideoCaptureModule* Create(const int32_t id, const char* uniqueId,
+-                                    const CaptureDeviceType type);
++                                    const CaptureDeviceType type,
++                                    bool captureCursor = true);
+   static VideoCaptureModule::DeviceInfo* CreateDeviceInfo(
+       const int32_t id, const CaptureDeviceType type);
+ 
+@@ -191,7 +192,7 @@ class DesktopCaptureImpl : public DesktopCapturer::Callback,
+ 
+  protected:
+   DesktopCaptureImpl(const int32_t id, const char* uniqueId,
+-                     const CaptureDeviceType type);
++                     const CaptureDeviceType type, bool captureCursor);
+   virtual ~DesktopCaptureImpl();
+   int32_t DeliverCapturedFrame(webrtc::VideoFrame& captureFrame,
+                                int64_t capture_time);
+@@ -239,10 +240,11 @@ class DesktopCaptureImpl : public DesktopCapturer::Callback,
+   void process();
+ 
+  private:
++  bool capture_cursor_ = true;
+   // This is created on the main thread and accessed on both the main thread
+   // and the capturer thread. It is created prior to the capturer thread
+   // starting and is destroyed after it is stopped.
+-  std::unique_ptr<DesktopAndCursorComposer> desktop_capturer_cursor_composer_;
++  std::unique_ptr<DesktopCapturer> desktop_capturer_cursor_composer_;
+ 
+   std::unique_ptr<EventWrapper> time_event_;
+ #if defined(_WIN32)
 diff --git a/dom/script/ScriptSettings.cpp b/dom/script/ScriptSettings.cpp
 index 3f69c0f398ab6d849fe011e836343c09110673ef..4c06a9100a1d41119cb2984ee3734a1043a9c50a 100644
 --- a/dom/script/ScriptSettings.cpp