--- a/layout/svg/nsSVGIntegrationUtils.cpp
+++ b/layout/svg/nsSVGIntegrationUtils.cpp
@@ -874,19 +874,25 @@ nsSVGIntegrationUtils::PaintMaskAndClipP
     if (!shouldGenerateClipMaskLayer && !shouldGenerateMaskLayer) {
       MOZ_ASSERT(opacity != 1.0f);
 
       matSR.SetContext(&context);
       SetupContextMatrix(firstFrame, aParams, offsetToBoundingBox,
                          offsetToUserSpace, true);
     }
 
-    context.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA,
-                                  opacityApplied ?  1.0 : opacity,
-                                  maskSurface, maskTransform);
+    if (aParams.layerManager->GetRoot()->GetContentFlags() & Layer::CONTENT_COMPONENT_ALPHA) {
+      context.PushGroupAndCopyBackground(gfxContentType::COLOR_ALPHA,
+                                         opacityApplied ?  1.0 : opacity,
+                                         maskSurface, maskTransform);
+    } else {
+      context.PushGroupForBlendBack(gfxContentType::COLOR_ALPHA,
+                                    opacityApplied ?  1.0 : opacity,
+                                    maskSurface, maskTransform);
+    }
   }
 
   /* If this frame has only a trivial clipPath, set up cairo's clipping now so
    * we can just do normal painting and get it clipped appropriately.
    */
   if (shouldApplyClipPath || shouldApplyBasicShape) {
     context.Save();
     SetupContextMatrix(firstFrame, aParams, offsetToBoundingBox,