update.xml

<?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:{503a85e3-84c9-40e5-b98e-98e62085837f}">
    <em:updates>
      <RDF:Seq>
        <RDF:li>
          <RDF:Description>
            <em:version>2.2.8-df1</em:version>
            <em:targetApplication>
              <RDF:Description>
                <em:id>{8de7fcbb-c55c-4fbe-bfc5-fc555c87dbc4}</em:id>
                <em:minVersion>25.0</em:minVersion>
                <em:maxVersion>30.*</em:maxVersion>
                <em:updateLink>https://github.com/dirkf/stylem/releases/download/v2.2.8-df1/stylem-2.2.8-df1-pm.xpi</em:updateLink>
              </RDF:Description>
            </em:targetApplication>
            <em:targetApplication>
              <RDF:Description>
                <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
                <em:minVersion>30.0.0a1</em:minVersion>
                <em:maxVersion>57.*</em:maxVersion>
                <em:updateLink>https://github.com/dirkf/stylem/releases/download/v2.2.8-df1/stylem-2.2.8-df1-pm.xpi</em:updateLink>
              </RDF:Description>
            </em:targetApplication>
            <em:targetApplication>
              <RDF:Description>
                <em:id>{92650c4d-4b8e-4d2a-b7eb-24ecf4f6b63a}</em:id>
                <em:minVersion>2.16</em:minVersion>
                <em:maxVersion>2.53.*</em:maxVersion>
                <em:updateLink>https://github.com/dirkf/stylem/releases/download/v2.2.8-df1/stylem-2.2.8-df1-pm.xpi</em:updateLink>
              </RDF:Description>
            </em:targetApplication>
          </RDF:Description>
        </RDF:li>
      </RDF:Seq>
    </em:updates>
  </RDF:Description>
</RDF:RDF>