pdf.js/extensions/firefox/update.rdf

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

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

  <RDF:Description about="urn:mozilla:extension:viewer@pdf.js">
    <em:updates>
      <RDF:Seq>
        <RDF:li>
          <RDF:Description>
            <em:version>PDFJSSCRIPT_VERSION</em:version>

            <!-- Firefox -->
            <em:targetApplication>
              <RDF:Description>
                <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
                <em:minVersion>45.0</em:minVersion>
                <em:maxVersion>54.0a1</em:maxVersion>
                <!-- Use the raw link for updates so we we can use SSL. -->
                <em:updateLink>https://raw.githubusercontent.com/mozilla/pdf.js/gh-pages/extensions/firefox/pdf.js.xpi</em:updateLink>
              </RDF:Description>
            </em:targetApplication>

            <!-- Android -->
            <em:targetApplication>
              <RDF:Description>
                <em:id>{aa3c5121-dab2-40e2-81ca-7ea25febc110}</em:id>
                <em:minVersion>45.0</em:minVersion>
                <em:maxVersion>54.0a1</em:maxVersion>
                <!-- Use the raw link for updates so we we can use SSL. -->
                <em:updateLink>https://raw.githubusercontent.com/mozilla/pdf.js/gh-pages/extensions/firefox/pdf.js.xpi</em:updateLink>
              </RDF:Description>
            </em:targetApplication>
          </RDF:Description>
        </RDF:li>
      </RDF:Seq>
    </em:updates>
  </RDF:Description>
</RDF:RDF>