附加组件与Firefox ESR中的应用程序版本不兼容

Question

我的浏览器插件在其install.rdf中包含以下几行：

<em:targetApplication>
  <Description>
    <em:id>...</em:id>
    <em:minVersion>53.0</em:minVersion>
    <em:maxVersion>63.*</em:maxVersion>
  </Description>
</em:targetApplication>

但是如果我想通过about:debugging将插件加载到Firefox 60.3.0esr中，则会出现标题为There was an error during installation: Add-on is not compatible with application version. add-on minVersion: 53.0. add-on maxVersion: 63.*.

的错误。

我在做什么错了？