[fix] #264 : implementation using Referrer Policy (Editor’s Draft, 3 March 2015)

searx/templates/courgette/base.html

         <meta name="description" content="Searx - a privacy-respecting, hackable metasearch engine" />
         <meta name="keywords" content="searx, search, search engine, metasearch, meta search" />
         <meta name="generator" content="searx/{{ searx_version }}">
+        <meta name="referrer" content="no-referrer">
         <meta name="viewport" content="width=device-width, maximum-scale=1.0, user-scalable=1" />
         <title>{% block title %}{% endblock %}searx</title>
         <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}" type="text/css" media="screen" />
             <script src="{{ url_for('static', filename='js/searx.js') }}" ></script>
         </div>
     </body>
-</html>
+</html>

searx/templates/default/base.html

         <meta name="description" content="Searx - a privacy-respecting, hackable metasearch engine" />
         <meta name="keywords" content="searx, search, search engine, metasearch, meta search" />
         <meta name="generator" content="searx/{{ searx_version }}">
+        <meta name="referrer" content="no-referrer">
         <meta name="viewport" content="width=device-width, maximum-scale=1.0, user-scalable=1" />
         <title>{% block title %}{% endblock %}searx</title>
         <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}" type="text/css" media="screen" />

searx/templates/oscar/base.html

     <meta name="keywords" content="searx, search, search engine, metasearch, meta search" />
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="generator" content="searx/{{ searx_version }}">
+    <meta name="referrer" content="no-referrer">
     <meta name="viewport" content="width=device-width, initial-scale=1 , maximum-scale=1.0, user-scalable=1" />
     {% block meta %}{% endblock %}
     <title>{% block title %}{% endblock %}searx</title>

searx/templates/pix-art/base.html

         <meta name="description" content="Searx - a privacy-respecting, hackable metasearch engine" />
         <meta name="keywords" content="searx, search, search engine, metasearch, meta search" />
         <meta name="generator" content="searx/{{ searx_version }}">
+        <meta name="referrer" content="no-referrer">
         <meta name="viewport" content="width=device-width, maximum-scale=1.0, user-scalable=1" />
         <title>{% block title %}{% endblock %}searx</title>
         <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}" type="text/css" media="screen" />