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>thunderlink@mozilla.org</em:id>
    <em:type>2</em:type>
    <em:name>ThunderLink</em:name>
    <em:version>1.2.11</em:version>
    <em:creator>Mike Hardy and Christopher Zwirello</em:creator>
    <em:description>Clickable, durable links to specific email messages!</em:description>
    <em:optionsURL>chrome://thunderlink/content/preferences.xul</em:optionsURL>
    <em:targetApplication>
      <Description>
        <em:id>{3550f703-e582-4d05-9a08-453d09bdfdc6}</em:id> <!-- Thunderbird -->
        <em:minVersion>38.0</em:minVersion>
        <em:maxVersion>68.*</em:maxVersion>
      </Description>
    </em:targetApplication>
    <em:skinnable>true</em:skinnable>
  </Description>
</RDF>