安装附加组件后，我在 Firefox 中看不到工具栏图标。 我在开发过程中遇到了这个问题。如果存在install.rdf文件，则附加组件的图标不会出现在 Firefox 工具栏中。但是，在没有文件的情况下，它绝对可以正常工作。怎么了？install.rdf

<?xml version="1.0" encoding="UTF-8"?>

<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:em="http://www.mozilla.org/2004/em-rdf#">
  <Description about="urn:mozilla:install-manifest">
    <em:id>extensionName@myDomain.com</em:id>
    <em:version>1.23</em:version>
    <em:type>2</em:type>

    <em:targetApplication>
      <Description>
        <em:id>{uuid here}</em:id>
        <em:minVersion>31.*</em:minVersion>
        <em:maxVersion>47.*</em:maxVersion>
      </Description>
    </em:targetApplication>

    <em:name>extensionName</em:name>
    <em:description>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Veniam voluptates natus soluta quis culpa animi, vitae laborum magnam! Facere reiciendis nihil porro non odio hic deserunt obcaecati soluta, nostrum recusandae!</em:description>
    <em:creator>Name LastName</em:creator>
    <em:homepageURL>http://www.mydDomain.com/</em:homepageURL>
  </Description>
</RDF>