Github OpenSearch for use in Firefox

github.xml

<OpenSearchDescription
  xmlns="http://a9.com/-/spec/opensearch/1.1/"
  xmlns:moz="http://www.mozilla.org/2006/browser/search/"
>
  <ShortName>Github</ShortName>
  <Description>Search github</Description>
  <InputEncoding>UTF-8</InputEncoding>
  <Image width="16" height="16" type="image/x-icon">
    https://github.com/favicon.ico
  </Image>
  <Url type="text/html" template="https://github.com/search" method="GET">
    <Param name="q" value="{searchTerms}" />
    <Param name="utf8" value="✓" />
    <Param name="type" value="" />
  </Url>
  <moz:SearchForm>https://github.com/search</moz:SearchForm>
  <!-- <Url type="application/x-suggestions+json" template="suggestionURL"/> -->
</OpenSearchDescription>