install.rdf

Copy the following text and paste it into a text file, then save that file as "install.rdf":

<?xml version="1.0"?>

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

  <Description about="urn:mozilla:install-manifest">
  <em:id>{Themes_UUID}</em:id>
    <em:version>Themes_Version</em:version>

<!-- Target Application this extension can install into,
         with minimum and maximum supported versions. -->

<em:targetApplication>
    <Description>
      <!-- Firefox's UUID -->
      <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
      <em:minVersion>Min_FF_Version</em:minVersion>
      <em:maxVersion>Max_FF_Version</em:maxVersion>
    </Description>
  </em:targetApplication>

  <!-- Front End MetaData -->
  <!-- My_Theme -->
  <em:name>My_Theme</em:name>
  <em:description>My_Theme</em:description>
  <em:creator>Your_Name</em:creator>
  <em:contributor>Contributors_Names</em:contributor>
  <em:homepageURL>Themes_HomePage</em:homepageURL>
  <em:updateURL> Url_of_Update_Location </em:updateURL>
  <em:aboutURL> Url_of_About_Page </em:aboutURL>

  <!-- Front End Integration Hooks (used by Theme Manager)-->
    <em:internalName>My_Theme</em:internalName>
  </Description>

</RDF>