--- a/dom/base/nsGlobalWindow.cpp
+++ b/dom/base/nsGlobalWindow.cpp
@@ -14377,16 +14377,32 @@ nsGlobalWindow::CreateImageBitmap(const 
   if (aImage.IsArrayBuffer() || aImage.IsArrayBufferView()) {
     aRv.Throw(NS_ERROR_NOT_IMPLEMENTED);
     return nullptr;
   }
 
   return ImageBitmap::Create(this, aImage, Some(gfx::IntRect(aSx, aSy, aSw, aSh)), aRv);
 }
 
+already_AddRefed<mozilla::dom::Promise>
+nsGlobalWindow::CreateImageBitmap(const ImageBitmapSource& aImage,
+                                  int32_t aOffset, int32_t aLength,
+                                  ImageBitmapFormat aFormat,
+                                  const Sequence<ChannelPixelLayout>& aLayout,
+                                  ErrorResult& aRv)
+{
+  if (aImage.IsArrayBuffer() || aImage.IsArrayBufferView()) {
+    return ImageBitmap::Create(this, aImage, aOffset, aLength, aFormat, aLayout,
+                               aRv);
+  } else {
+    aRv.Throw(NS_ERROR_TYPE_ERR);
+    return nullptr;
+  }
+}
+
 // Helper called by methods that move/resize the window,
 // to ensure the presContext (if any) is aware of resolution
 // change that may happen in multi-monitor configuration.
 void
 nsGlobalWindow::CheckForDPIChange()
 {
   if (mDocShell) {
     RefPtr<nsPresContext> presContext;

--- a/dom/base/nsGlobalWindow.h
+++ b/dom/base/nsGlobalWindow.h
@@ -98,21 +98,23 @@ class nsIIdleService;
 struct nsRect;
 
 class nsWindowSizes;
 
 namespace mozilla {
 class DOMEventTargetHelper;
 namespace dom {
 class BarProp;
+struct ChannelPixelLayout;
 class Console;
 class Crypto;
 class External;
 class Function;
 class Gamepad;
+enum class ImageBitmapFormat : uint32_t;
 class MediaQueryList;
 class MozSelfSupport;
 class Navigator;
 class OwningExternalOrWindowProxy;
 class Promise;
 class PostMessageEvent;
 struct RequestInit;
 class RequestOrUSVString;
@@ -1198,16 +1200,24 @@ public:
   CreateImageBitmap(const mozilla::dom::ImageBitmapSource& aImage,
                     mozilla::ErrorResult& aRv);
 
   already_AddRefed<mozilla::dom::Promise>
   CreateImageBitmap(const mozilla::dom::ImageBitmapSource& aImage,
                     int32_t aSx, int32_t aSy, int32_t aSw, int32_t aSh,
                     mozilla::ErrorResult& aRv);
 
+  already_AddRefed<mozilla::dom::Promise>
+  CreateImageBitmap(const mozilla::dom::ImageBitmapSource& aImage,
+                    int32_t aOffset, int32_t aLength,
+                    mozilla::dom::ImageBitmapFormat aFormat,
+                    const mozilla::dom::Sequence<mozilla::dom::ChannelPixelLayout>& aLayout,
+                    mozilla::ErrorResult& aRv);
+
+
   // ChromeWindow bits.  Do NOT call these unless your window is in
   // fact an nsGlobalChromeWindow.
   uint16_t WindowState();
   nsIBrowserDOMWindow* GetBrowserDOMWindowOuter();
   nsIBrowserDOMWindow* GetBrowserDOMWindow(mozilla::ErrorResult& aError);
   void SetBrowserDOMWindowOuter(nsIBrowserDOMWindow* aBrowserWindow);
   void SetBrowserDOMWindow(nsIBrowserDOMWindow* aBrowserWindow,
                            mozilla::ErrorResult& aError);