Как удалить несуществующее расширение?

<?xml version="1.0"?> <RDF:RDF xmlns:em="http://www.mozilla.org/2004/em-rdf#" xmlns:NC="http://home.netscape.com/NC-rdf#" xmlns:RDF="http://www.w3.org/1999/02/22-rdf-syntax-ns#"> <RDF:Description RDF:about="rdf:#$SdACm2" em:id="{ec8030f7-c20a-464f-9b0e-13a3a9e97384}" em:minVersion="1.0" em:maxVersion="1.0" /> <RDF:Seq RDF:about="urn:mozilla:theme:root"> <RDF:li RDF:resource="urn:mozilla:theme:{972ce4c6-7e08-4474-a285-3208198ce6fd}"/> </RDF:Seq> <RDF:Description RDF:about="urn:mozilla:theme:{972ce4c6-7e08-4474-a285-3208198ce6fd}" em:version="2.0" em:name="Firefox (default)" em:description="The default theme" em:creator="Gerich and Horlander" em:internalName="classic/1.0" em:locked="true" em:contributor="Mozilla Contributors"> <em:targetApplication RDF:resource="rdf:#$SdACm2"/> </RDF:Description> <RDF:Seq RDF:about="urn:mozilla:extension:root"> </RDF:Seq> </RDF:RDF>

Вот тут: C:\Program Files\Mozilla Firefox\extensions
есть только одна папка с подобным названием: {972ce4c6-7e08-4474-a285-3208198ce6fd}
в ней папка chrome и файл install.rdf

Выделить код

Код:

<?xml version="1.0"?>


<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>{972ce4c6-7e08-4474-a285-3208198ce6fd}</em:id>
    <em:version>2.0</em:version>
    
    <!-- Target Application this theme can install into, 
        with minimum and maximum supported versions. --> 
    <em:targetApplication>
      <Description>
        <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
        <em:minVersion>1.5</em:minVersion>
        <em:maxVersion>1.5</em:maxVersion>
      </Description>
    </em:targetApplication>
    
    <!-- Front End MetaData -->
    <em:name>Firefox (default)</em:name>
    <em:description>The default theme</em:description>
    
    <!-- EXTENSION AUTHORS!
         DO NOT COPY THIS PROPERTY INTO YOUR INSTALL RDF FILES
         It will cause users not to be informed of incompatibilities 
         with your extension when they are updated with Software Update
         and your extension will become unavailable to them!
         -->
    <em:appManaged>true</em:appManaged>

    <em:locked>true</em:locked>

    <!-- Front End Integration Hooks (used by Theme Manager)-->
    <!-- XXXben - preprocess this file to use different info for mac version -->
    <em:creator>Gerich and Horlander</em:creator>
    <em:contributor>Mozilla Contributors</em:contributor>

    <em:internalName>classic/1.0</em:internalName>
  </Description>      

</RDF>