Below is my svg code and I get the following error message on firefox browser:
XML解析错误：前缀未绑定到命名空间 地点：http://localhost/spm_dev/material-design-iconsets/iconsets/action-icons.svg 第50行，第84栏：
图标显示但是图标上的click事件监听器在chrome和microsoft边缘上工作时无法在firefox上运行。拜托我需要你的帮忙。我做错了什么。
<g id="event_seat"><defs><path id="a" d="M0 0h24v24H0V0z"/></defs><clipPath id="b"><use xlink:href="#a" overflow="visible"/></clipPath><path d="M4 18v3h3v-3h10v3h3v-6H4zm15-8h3v3h-3zM2 10h3v3H2zm15 3H7V5c0-1.1.9-2 2-2h6c1.1 0 2 .9 2 2v8z" clip-path="url(#b)"/></g>