DuckDuckGo HTTPS with POST requests search using Startpage suggestions (plugin for Firefox).

duckduckgo.xml

<!-- DuckDuckGo HTTPS with POST requests search using Startpage suggestions.
   - Url params: https://duckduckgo.com/params-->

<SearchPlugin xmlns="http://www.mozilla.org/2006/browser/search/">
    <ShortName>DuckDuckGo</ShortName>
    <Description>We believe you can get better search and privacy at the same time.</Description>
    <InputEncoding>UTF-8</InputEncoding>
    <Image height="16" width="16" type="image/x-icon">data:image/x-icon;base64,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</Image>
    <Url type="application/x-suggestions+json" method="POST" template="https://startpage.com/do/suggest">
    <Param name="lang" value="english"/>
    <Param name="output" value="json"/>
    <Param name="query" value="{searchTerms}"/>
    </Url>
    <Url type="text/html" method="POST" template="https://duckduckgo.com/">
    <Param name="kg" value="p"/>
    <Param name="kp" value="-1"/>
        <Param name="q" value="{searchTerms}"/>
        <Param name="t" value="fedora"/>
    </Url>
    <SearchForm>https://duckduckgo.com/</SearchForm>
</SearchPlugin>