问shadowdomv1在火狐上的兼容性

EN

<script type="text/javascript" src="https://rawgithub.com/webcomponents/webcomponentsjs/master/webcomponents-hi-sd-ce.js"></script>
<style type="text/css">
    h2 {
        color: red;
        border-bottom: 1px black dotted;
    }
</style>
<h2>h2 red and dotted</h2>

<my-element>
</my-element>

<template id="myElementTemplate">
    <style scope="my-element">
        h2 {color: blue}
    </style>
    <div>
        <h2>h2 blue and not dotted !</h2> <!-- Should not be dotted because of the encapsulation -->
    </div>
</template>

<script type="text/javascript">
    ShadyCSS.prepareTemplate(myElementTemplate, 'my-element');

    class MyElement extends HTMLElement {
        connectedCallback() {
            ShadyCSS.styleElement(this);

            if (!this.shadowRoot) {
                this.attachShadow({mode: 'open'});
                this.shadowRoot.appendChild(document.importNode(myElementTemplate.content, true));
            }
            ShadyCSS.styleElement(this);
        }
    }

    customElements.define("my-element", MyElement);
</script>