define_MozAppearance.js

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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/. */

"use strict";

if (

  !(window.CSSStyleProperties ?? window.CSS2Properties).prototype.MozAppearance

) {

  const proto = (window.CSSStyleProperties ?? window.CSS2Properties).prototype;

  Object.defineProperty(proto, "MozAppearance", {

    configurable: true,

    enumerable: true,

    get: () => "",

    set() {},

});

  window.__webcompat = (window.__webcompat ?? new Set()).add("MozAppearance");