--- a/gfx/webrender_bindings/webrender_ffi_generated.h
+++ b/gfx/webrender_bindings/webrender_ffi_generated.h
@@ -1,13 +1,13 @@
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
-/* Generated with cbindgen:0.1.25 */
+/* Generated with cbindgen:0.1.26 */
 
 /* DO NOT MODIFY THIS MANUALLY! This file was generated using cbindgen.
  * To generate this file:
  *   1. Get the latest cbindgen using `cargo install --force cbindgen`
  *      a. Alternatively, you can clone `https://github.com/rlhunt/cbindgen` and use a tagged release
  *   2. Run `rustup run nightly cbindgen toolkit/library/rust/ --crate webrender_bindings -o gfx/webrender_bindings/webrender_ffi_generated.h`
  */
 
@@ -30,19 +30,18 @@ enum class BorderStyle : uint32_t {
   Ridge = 7,
   Inset = 8,
   Outset = 9,
 
   Sentinel /* this must be last for serialization purposes. */
 };
 
 enum class BoxShadowClipMode : uint32_t {
-  None = 0,
-  Outset = 1,
-  Inset = 2,
+  Outset = 0,
+  Inset = 1,
 
   Sentinel /* this must be last for serialization purposes. */
 };
 
 enum class ExtendMode : uint32_t {
   Clamp = 0,
   Repeat = 1,
 
@@ -268,17 +267,17 @@ struct TypedSize2D_f32__LayerPixel {
   }
 };
 
 typedef TypedSize2D_f32__LayerPixel LayerSize;
 
 typedef LayerSize LayoutSize;
 
 // Describes the memory layout of a display list.
-// 
+//
 // A display list consists of some number of display list items, followed by a number of display
 // items.
 struct BuiltDisplayListDescriptor {
   // The first IPC time stamp: before any work has been done
   uint64_t builder_start_time;
   // The second IPC time stamp: after serialization
   uint64_t builder_finish_time;
   // The third IPC time stamp: just before sending
@@ -308,16 +307,27 @@ struct WrOpacityProperty {
   float opacity;
 
   bool operator==(const WrOpacityProperty& aOther) const {
     return id == aOther.id &&
            opacity == aOther.opacity;
   }
 };
 
+// A 3d transform stored as a 4 by 4 matrix in row-major order in memory.
+//
+// Transforms can be parametrized over the source and destination units, to describe a
+// transformation from a space to another.
+// For example, `TypedTransform3D<f32, WordSpace, ScreenSpace>::transform_point3d`
+// takes a `TypedPoint3D<f32, WordSpace>` and returns a `TypedPoint3D<f32, ScreenSpace>`.
+//
+// Transforms expose a set of convenience methods for pre- and post-transformations.
+// A pre-transformation corresponds to adding an operation that is applied before
+// the rest of the transformation, while a post-transformation adds an operation
+// that is applied after.
 struct TypedTransform3D_f32__LayoutPixel__LayoutPixel {
   float m11;
   float m12;
   float m13;
   float m14;
   float m21;
   float m22;
   float m23;
@@ -373,33 +383,34 @@ struct IdNamespace {
   bool operator<=(const IdNamespace& aOther) const {
     return mHandle <= aOther.mHandle;
   }
 };
 
 typedef IdNamespace WrIdNamespace;
 
 // Represents RGBA screen colors with floating point numbers.
-// 
+//
 // All components must be between 0.0 and 1.0.
 // An alpha value of 1.0 is opaque while 0.0 is fully transparent.
 struct ColorF {
   float r;
   float g;
   float b;
   float a;
 
   bool operator==(const ColorF& aOther) const {
     return r == aOther.r &&
            g == aOther.g &&
            b == aOther.b &&
            a == aOther.a;
   }
 };
 
+// A 2d Point tagged with a unit.
 struct TypedPoint2D_f32__LayerPixel {
   float x;
   float y;
 
   bool operator==(const TypedPoint2D_f32__LayerPixel& aOther) const {
     return x == aOther.x &&
            y == aOther.y;
   }
@@ -555,16 +566,17 @@ struct NinePatchDescriptor {
 
   bool operator==(const NinePatchDescriptor& aOther) const {
     return width == aOther.width &&
            height == aOther.height &&
            slice == aOther.slice;
   }
 };
 
+// A 2d Vector tagged with a unit.
 struct TypedVector2D_f32__LayerPixel {
   float x;
   float y;
 
   bool operator==(const TypedVector2D_f32__LayerPixel& aOther) const {
     return x == aOther.x &&
            y == aOther.y;
   }
@@ -635,16 +647,17 @@ struct ByteSlice {
   size_t len;
 
   bool operator==(const ByteSlice& aOther) const {
     return buffer == aOther.buffer &&
            len == aOther.len;
   }
 };
 
+// A 2d Point tagged with a unit.
 struct TypedPoint2D_u16__Tiles {
   uint16_t x;
   uint16_t y;
 
   bool operator==(const TypedPoint2D_u16__Tiles& aOther) const {
     return x == aOther.x &&
            y == aOther.y;
   }

--- a/layout/reftests/box-shadow/reftest.list
+++ b/layout/reftests/box-shadow/reftest.list
@@ -5,40 +5,40 @@ random == boxshadow-blur-2.html boxshado
 random != boxshadow-blur-2.html boxshadow-blur-2-notref.html # fixedpoint division in blur code makes this fail
 == boxshadow-multiple.html boxshadow-multiple-ref.html
 == boxshadow-spread.html boxshadow-spread-ref.html
 == tableboxshadow-basic.html tableboxshadow-basic-ref.html
 == tableboxshadow-trshadow.html tableboxshadow-trshadow-ref.html
 == tableboxshadow-tdshadow.html tableboxshadow-tdshadow-ref.html
 == boxshadow-rounding.html boxshadow-rounding-ref.html
 # One uses old path, one uses WR box shadow.
-fails-if(Android) fuzzy-if(webrender,50,3310) == boxshadow-button.html boxshadow-button-ref.html
-fuzzy-if(OSX==1010,1,24) fuzzy-if(d2d,16,908) fuzzy-if(webrender,23,1920) == boxshadow-large-border-radius.html boxshadow-large-border-radius-ref.html # Bug 1209649
+fails-if(Android) fuzzy-if(webrender,33-33,3328-3328) == boxshadow-button.html boxshadow-button-ref.html
+fuzzy-if(OSX==1010,1,24) fuzzy-if(d2d,16,908) fuzzy-if(webrender,118-118,2160-2160) == boxshadow-large-border-radius.html boxshadow-large-border-radius-ref.html # Bug 1209649
 
 fails-if(Android) == boxshadow-fileupload.html boxshadow-fileupload-ref.html
 fuzzy-if(skiaContent,13,28) fuzzy-if(webrender,25-25,50-50) == boxshadow-inner-basic.html boxshadow-inner-basic-ref.svg
 random-if(layersGPUAccelerated) == boxshadow-mixed.html boxshadow-mixed-ref.html
 == boxshadow-mixed-2.html boxshadow-mixed-2-ref.html
 random-if(d2d) fuzzy-if(skiaContent,1,100) fuzzy-if(webrender,127,3528) == boxshadow-rounded-spread.html boxshadow-rounded-spread-ref.html
 fuzzy-if(skiaContent,1,50) fails-if(stylo) HTTP(..) == boxshadow-dynamic.xul boxshadow-dynamic-ref.xul # bug 1408235
 random-if(d2d) fails-if(webrender) == boxshadow-onecorner.html boxshadow-onecorner-ref.html
 random-if(d2d) fails-if(webrender) == boxshadow-twocorners.html boxshadow-twocorners-ref.html
 random-if(d2d) fails-if(webrender) == boxshadow-threecorners.html boxshadow-threecorners-ref.html
 fuzzy(2,440) fuzzy-if(webrender,25,1300) == boxshadow-skiprect.html boxshadow-skiprect-ref.html
 == boxshadow-opacity.html boxshadow-opacity-ref.html
 == boxshadow-color-rounding.html boxshadow-color-rounding-ref.html
 == boxshadow-color-rounding-middle.html boxshadow-color-rounding-middle-ref.html
-fuzzy(3,500) fuzzy-if(d2d,2,1080) fuzzy-if(webrender,13-13,1000-1000) == boxshadow-border-radius-int.html boxshadow-border-radius-int-ref.html
-fuzzy-if(webrender,1,4) == boxshadow-inset-neg-spread.html about:blank
+fuzzy(3,500) fuzzy-if(d2d,2,1080) == boxshadow-border-radius-int.html boxshadow-border-radius-int-ref.html
+fails-if(webrender) == boxshadow-inset-neg-spread.html about:blank
 == boxshadow-inset-neg-spread2.html boxshadow-inset-neg-spread2-ref.html
 fuzzy(26,3610) fuzzy-if(d2d,26,5910) fuzzy-if(webrender,43,200) == boxshadow-rotated.html boxshadow-rotated-ref.html # Bug 1211264
 == boxshadow-inset-large-border-radius.html boxshadow-inset-large-border-radius-ref.html
 
 # fuzzy due to blur going inside, but as long as it's essentially black instead of a light gray its ok.
-fuzzy(13,9445) fuzzy-if(d2d,13,10926) fuzzy-if(webrender,14,14307) == boxshadow-inset-large-offset.html boxshadow-inset-large-offset-ref.html
+fuzzy(13,9445) fuzzy-if(d2d,13,10926) fails-if(webrender) == boxshadow-inset-large-offset.html boxshadow-inset-large-offset-ref.html
 
 == overflow-not-scrollable-1.html overflow-not-scrollable-1-ref.html
 == overflow-not-scrollable-1.html overflow-not-scrollable-1-ref2.html
 == overflow-not-scrollable-2.html overflow-not-scrollable-2-ref.html
 fuzzy-if(webrender,1,655) == 611574-1.html 611574-1-ref.html
 fuzzy-if(webrender,4,144) == 611574-2.html 611574-2-ref.html
 fuzzy-if(winWidget,5,30) fuzzy-if(skiaContent,16,10) fuzzy-if(webrender,51-51,120-120) == fieldset.html fieldset-ref.html # minor anti-aliasing problem on Windows
 fuzzy-if(winWidget,5,30) fuzzy-if(skiaContent,16,10) fails-if(webrender) == fieldset-inset.html fieldset-inset-ref.html # minor anti-aliasing problem on Windows

--- a/layout/reftests/css-break/reftest.list
+++ b/layout/reftests/css-break/reftest.list
@@ -1,12 +1,12 @@
 default-preferences pref(layout.css.box-decoration-break.enabled,true)
 
 == box-decoration-break-1.html box-decoration-break-1-ref.html
-fuzzy(1,20) fuzzy-if(skiaContent,1,700) fuzzy-if(webrender,7-7,316-316) == box-decoration-break-with-inset-box-shadow-1.html box-decoration-break-with-inset-box-shadow-1-ref.html
+fuzzy(1,20) fuzzy-if(skiaContent,1,700) fuzzy-if(webrender,17-17,6785-6785) == box-decoration-break-with-inset-box-shadow-1.html box-decoration-break-with-inset-box-shadow-1-ref.html
 fuzzy(45,460) fuzzy-if(skiaContent,57,439) fuzzy-if(Android,57,1330) fuzzy-if(styloVsGecko,45,1410) == box-decoration-break-with-outset-box-shadow-1.html box-decoration-break-with-outset-box-shadow-1-ref.html # Bug 1386543
 random-if(!gtkWidget) HTTP(..) == box-decoration-break-border-image.html box-decoration-break-border-image-ref.html
 == box-decoration-break-block-border-padding.html box-decoration-break-block-border-padding-ref.html
 == box-decoration-break-block-margin.html box-decoration-break-block-margin-ref.html
 fuzzy-if(!Android,1,62) fuzzy-if(Android,8,6627) == box-decoration-break-first-letter.html box-decoration-break-first-letter-ref.html #Bug 1313773
 == box-decoration-break-with-bidi.html box-decoration-break-with-bidi-ref.html
 == box-decoration-break-bug-1235152.html box-decoration-break-bug-1235152-ref.html
 == box-decoration-break-bug-1249913.html box-decoration-break-bug-1249913-ref.html