*Bug*

When a `textarea` has the `required` attribute it renders in the invalid state using FireFox. 

This behavior is visible here: https://codesandbox.io/s/rough-frog-f00ow. Remember to view it in FireFox.  

I expect the required field to validate on form submit and not before. 

I have tested this with FireFox 68 and 69 and React 16.8.6

This appears appears to be a re-occurrence of: https://github.com/facebook/react/issues/8395


/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow
 */
import invariant from 'shared/invariant';
import warning from 'shared/warning';
import ReactControlledValuePropTypes from '../shared/ReactControlledValuePropTypes';
import {getCurrentFiberOwnerNameInDevOrNull} from 'react-reconciler/src/ReactCurrentFiber';
import {getToStringValue, toString} from './ToStringValue';
import type {ToStringValue} from './ToStringValue';
let didWarnValDefaultVal = false;
type TextAreaWithWrapperState = HTMLTextAreaElement & {
  _wrapperState: {
    initialValue: ToStringValue,
  },
};
/**
 * Implements a <textarea> host component that allows setting `value`, and
 * `defaultValue`. This differs from the traditional DOM API because value is
 * usually set as PCDATA children.
 *
 * If `value` is not supplied (or null/undefined), user actions that affect the