install.rdf

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

<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:NC="http://home.netscape.com/NC-rdf#"
     xmlns:em="http://www.mozilla.org/2004/em-rdf#">

  <Description about="urn:mozilla:install-manifest">
    <!-- nsIUpdateItem type for a Multiple Item Package -->
    <em:type>32</em:type>    
    <em:id>[email protected]</em:id>
    <em:targetApplication>
      <Description>
        <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id> <!--Firefox-->
        <em:minVersion>40.0</em:minVersion>
        <em:maxVersion>44.*</em:maxVersion>
      </Description>
    </em:targetApplication>    
  </Description>
  
</RDF>