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diff --git a/components/script/dom/webidls/DOMMatrixReadOnly.webidl b/components/script/dom/webidls/DOMMatrixReadOnly.webidl
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+/* 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/. */
+/*
+ * The origin of this IDL file is
+ * https://drafts.fxtf.org/geometry-1/#DOMMatrix
+ *
+ * Copyright:
+ * To the extent possible under law, the editors have waived all copyright and
+ * related or neighboring rights to this work.
+ */
+
+[Constructor,
+// Constructor(DOMString transformList)
+Constructor(sequence<unrestricted double> numberSequence),
+// Exposed=(Window,Worker)
+]
+interface DOMMatrixReadOnly {
+
+    [NewObject, Throws] static DOMMatrixReadOnly fromMatrix(optional DOMMatrixInit other);
+//  [NewObject] static DOMMatrixReadOnly fromFloat32Array(Float32Array array32);
+//  [NewObject] static DOMMatrixReadOnly fromFloat64Array(Float64Array array64);
+
+    // These attributes are simple aliases for certain elements of the 4x4 matrix
+    readonly attribute unrestricted double a;
+    readonly attribute unrestricted double b;
+    readonly attribute unrestricted double c;
+    readonly attribute unrestricted double d;
+    readonly attribute unrestricted double e;
+    readonly attribute unrestricted double f;
+
+    readonly attribute unrestricted double m11;
+    readonly attribute unrestricted double m12;
+    readonly attribute unrestricted double m13;
+    readonly attribute unrestricted double m14;
+    readonly attribute unrestricted double m21;
+    readonly attribute unrestricted double m22;
+    readonly attribute unrestricted double m23;
+    readonly attribute unrestricted double m24;
+    readonly attribute unrestricted double m31;
+    readonly attribute unrestricted double m32;
+    readonly attribute unrestricted double m33;
+    readonly attribute unrestricted double m34;
+    readonly attribute unrestricted double m41;
+    readonly attribute unrestricted double m42;
+    readonly attribute unrestricted double m43;
+    readonly attribute unrestricted double m44;
+
+    readonly attribute boolean is2D;
+    readonly attribute boolean isIdentity;
+
+    // Immutable transform methods
+    DOMMatrix translate(optional unrestricted double tx = 0,
+                        optional unrestricted double ty = 0,
+                        optional unrestricted double tz = 0);
+    DOMMatrix scale(optional unrestricted double scaleX = 1,
+                    optional unrestricted double scaleY,
+                    optional unrestricted double scaleZ = 1,
+                    optional unrestricted double originX = 0,
+                    optional unrestricted double originY = 0,
+                    optional unrestricted double originZ = 0);
+    DOMMatrix scale3d(optional unrestricted double scale = 1,
+                      optional unrestricted double originX = 0,
+                      optional unrestricted double originY = 0,
+                      optional unrestricted double originZ = 0);
+    DOMMatrix rotate(optional unrestricted double rotX = 0,
+                     optional unrestricted double rotY,
+                     optional unrestricted double rotZ);
+    DOMMatrix rotateFromVector(optional unrestricted double x = 0,
+                               optional unrestricted double y = 0);
+    DOMMatrix rotateAxisAngle(optional unrestricted double x = 0,
+                              optional unrestricted double y = 0,
+                              optional unrestricted double z = 0,
+                              optional unrestricted double angle = 0);
+    DOMMatrix skewX(optional unrestricted double sx = 0);
+    DOMMatrix skewY(optional unrestricted double sy = 0);
+    [Throws] DOMMatrix multiply(optional DOMMatrixInit other);
+    DOMMatrix flipX();
+    DOMMatrix flipY();
+    DOMMatrix inverse();
+
+    DOMPoint            transformPoint(optional DOMPointInit point);
+//  Float32Array        toFloat32Array();
+//  Float64Array        toFloat64Array();
+//                      stringifier;
+//                      serializer = { attribute };
+
+};