install.rdf

<?xml version="1.0" encoding="UTF-8"?>
<RDF xmlns="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
     xmlns:em="http://www.mozilla.org/2004/em-rdf#">

  <!--
    The id for the extension. You will need to change this if You
    want to share this from addons.mozilla.org.

    The type of 256 is a special one to indicate its an experiment.

    The first part of the id (before the @) must match the namespace used
    in api.js and schema.json.
  -->
  <Description about="urn:mozilla:install-manifest">
    <em:id>keyboard_shortcut@experiments.addons.mozilla.org</em:id>
    <em:name>keyboard shortcut API</em:name>
    <em:type>256</em:type>
    <em:version>0.1</em:version>
    <em:description>programmatically perform actions possible with keyboard presses</em:description>
    <em:creator>Mozilla</em:creator>

    <em:targetApplication>
      <!-- Firefox -->
      <Description>
          <em:id>{ec8030f7-c20a-464f-9b0e-13a3a9e97384}</em:id>
          <em:minVersion>50.0</em:minVersion>
          <em:maxVersion>*</em:maxVersion>
      </Description>
    </em:targetApplication>
  </Description>
</RDF>