diff --git a/swh/web/static/css/style.css b/swh/web/static/css/style.css
index 0b9dec38c..a18ef172e 100644
--- a/swh/web/static/css/style.css
+++ b/swh/web/static/css/style.css
@@ -1,582 +1,604 @@
 /*
 version:   0.1
 date:      21/09/15
 author:    swh
 email:     swh
 website:   softwareheritage.org
 version history: /style.css
 */
 
 @import url(https://fonts.googleapis.com/css?family=Alegreya:400,400italic,700,700italic);
 @import url(https://fonts.googleapis.com/css?family=Alegreya+Sans:400,400italic,500,500italic,700,700italic,100,300,100italic,300italic);
 
 html {
     height: 100%;
+    overflow-x: hidden;
 }
 
 body {
     font-family: 'Alegreya Sans', sans-serif;
     font-size: 1.7rem;
     line-height: 1.5;
     color: rgba(0, 0, 0, 0.55);
     padding-bottom: 120px;
     min-height: 100%;
     margin: 0;
     position: relative;
 }
 
 .heading {
     font-family: 'Alegreya', serif;
 }
 
 .shell, .text {
     font-size: 0.7em;
 }
 
 .logo img {
     max-height: 40px;
 }
 .logo .navbar-brand {
     padding: 5px;
 }
 .logo .sitename {
     padding: 15px 5px;
 }
 
 .jumbotron {
     padding: 0;
     background-color: rgba(0, 0, 0, 0);
     position: fixed;
     top: 0;
     width: 100%;
     z-index: 10;
 }
 
 #swh-navbar-collapse {
     border-top-style: none;
     border-left-style: none;
     border-right-style: none;
     border-bottom: 5px solid;
     border-image: linear-gradient(to right, rgb(226, 0, 38) 0%, rgb(254, 205, 27) 100%) 1 1 1 1;
     width: 100%;
     padding: 5px;
 }
 
 .nav-horizontal {
     float: right;
 }
 
 h3[id], h4[id], a[id] {  /* avoid in-page links covered by navbar */
     padding-top: 80px;
     margin-top: -70px;
 }
 
 h1, h2, h3, h4  {
     margin: 0;
     color: #e20026;
     padding-bottom: 10px;
 }
 h1 { font-size: 1.8em; }
 h2 { font-size: 1.2em; }
 h3 { font-size: 1.1em; }
 
 a {
     color: rgba(0, 0, 0, 0.75);
     border-bottom-style: dotted;
     border-bottom-width: 1px;
     border-bottom-color: rgb(91, 94, 111);
 }
 
 a:hover {
     color: black;
 }
 
 ul.dropdown-menu a,
 .navbar-header a,
 ul.navbar-nav a { /* No decoration on links in dropdown menu */
     border-bottom-style: none;
     color: #323232;
     font-weight: 700;
 }
 
 .navbar-header a:hover,
 ul.navbar-nav a:hover {
     color: #8f8f8f;
 }
 
 .sitename .first-word, .sitename .second-word {
     color: rgba(0, 0, 0, 0.75);
     font-weight: normal;
     font-size: 1.8rem;
 }
 
 .sitename .first-word {
     font-family: 'Alegreya Sans', sans-serif;
 }
 
 .sitename .second-word {
     font-family: 'Alegreya', serif;
 }
 
 ul.dropdown-menu > li,
 ul.dropdown-menu > li > ul > li { /* No decoration on bullet points in dropdown menu */
     list-style-type: none;
 }
 
 .page {
     margin: 2em auto;
     width: 35em;
     border: 5px solid #ccc;
     padding: 0.8em;
     background: white;
 }
 .entries {
     list-style: none;
     margin: 0;
     padding: 0;
 }
 .entries li {
     margin: 0.8em 1.2em;
 }
 .entries li h2 {
     margin-left: -1em;
 }
 .add-entry {
     font-size: 0.9em;
     border-bottom: 1px solid #ccc;
 }
 .add-entry dl {
     font-weight: bold;
 }
 .metanav {
     text-align: right;
     font-size: 0.8em;
     padding: 0.3em;
     margin-bottom: 1em;
     background: #fafafa;
 }
 .flash {
     background: #cee5F5;
     padding: 0.5em;
     border: 1px solid #aacbe2;
 }
 .error {
     background: #f0d6d6;
     padding: 0.5em;
 }
 
 .file-found {
     color: #23BA49;
 }
 .file-notfound {
     color: #FF4747;
 }
 
 /* Bootstrap custom styling to correctly render multiple
  * form-controls in an input-group:
  *                github.com/twbs/bootstrap/issues/12732 */
 
 .input-group-field {
     display: table-cell;
     vertical-align: middle;
     border-radius:4px;
     min-width:1%;
     white-space: nowrap;
 }
 
 .input-group-field .form-control {
     border-radius: inherit !important;
 }
 
 .input-group-field:not(:first-child):not(:last-child) {
     border-radius:0;
 }
 
 .input-group-field:not(:first-child):not(:last-child) .form-control {
     border-left-width: 0;
     border-right-width: 0;
 }
 
 .input-group-field:last-child {
     border-top-left-radius:0;
     border-bottom-left-radius:0;
 }
 
 .input-group > span:not(:last-child) > button {
    border-radius: 0;
 }
 
 .multi-input-group > .input-group-btn {
   vertical-align: bottom;
   padding: 0;
 }
 
 .dataTables_filter {
     margin-top: 15px;
 }
 
 .dataTables_filter input {
     width: 70%;
     float: right;
 }
 
 tr.api-doc-route-upcoming > td, tr.api-doc-route-upcoming > td > a {
     font-size: 90%;
 }
 
 tr.api-doc-route-deprecated > td, tr.api-doc-route-deprecated > td > a {
     color: red;
 }
 
 #back-to-top {
   display: initial;
   position: fixed;
   bottom: 30px;
   right: 30px;
   z-index: 10;
 }
 
 #back-to-top a img {
   display: block;
   width: 32px;
   height: 32px;
   background-size: 32px 32px;
   text-indent: -999px;
   overflow: hidden;
 }
 
 .table > thead > tr > th {
     border-bottom: 1px solid #e20026;
 }
 
 .table > tbody > tr > td {
     border-style: none;
 }
 
 pre {
     background-color: #f5f5f5;
 }
 
 .dataTables_wrapper {
     position: static;
 }
 
 /* breadcrumbs */
 
 .bread-crumbs{
     display: inline-block;
     overflow: hidden;
     color: rgba(0, 0, 0, 0.55);
 }
 
 bread-crumbs ul {
     list-style-type: none;
 }
 
 .bread-crumbs li {
     float: left;
     list-style-type: none;
 }
 
 .bread-crumbs a {
     color: rgba(0, 0, 0, 0.75);
     border-bottom-style: none;
 }
 
 .bread-crumbs a:hover {
     color: rgba(0, 0, 0, 0.85);
     text-decoration: underline;
 }
 
 .title-small .bread-crumbs{
     margin: -30px 0 25px;
 }
 
 #footer {
     background-color: #262626;
     color: hsl(0, 0%, 100%);
     font-size: 1.2rem;
     text-align: center;
     padding-top: 20px;
     padding-bottom: 20px;
     position: absolute;
     bottom: 0;
     left: 0;
     right: 0;
 }
 #footer a,
 #footer a:visited {
     color: hsl(0, 0%, 100%);
 }
 #footer a:hover {
     text-decoration: underline;
 }
 
 .highlightjs pre {
     background-color: transparent;
     border-radius: 0px;
     border-color: transparent;
 }
 
 .hljs {
     background-color: transparent;
     white-space: pre;
 }
 
 .scrollable-menu {
     max-height: 180px;
     overflow-x: hidden;
 }
 
 .swh-browse-top-navigation {
     border-bottom: 1px solid #ddd;
     min-height: 42px;
     padding: 4px 5px 0px 5px;
 }
 
 .swh-browse-bread-crumbs {
     font-size: inherit;
     vertical-align: text-top;
     margin-bottom: 1px;
 }
 
 .swh-browse-bread-crumbs li:nth-child(n+2)::before {
     content: "";
     display: inline-block;
     margin: 0 2px;
 }
 
 .swh-metadata-table-row {
     border-top: 1px solid #ddd !important;
 }
 
 /* for block of numbers */
 td.hljs-ln-numbers {
 	-webkit-touch-callout: none;
 	-webkit-user-select: none;
 	-khtml-user-select: none;
 	-moz-user-select: none;
 	-ms-user-select: none;
 	user-select: none;
 
 	text-align: center;
 	color: #ccc;
 	border-right: 1px solid #CCC;
 	vertical-align: top;
 	padding-right: 5px;
 
 	/* your custom style here */
 }
 
 /* for block of code */
 td.hljs-ln-code {
 	padding-left: 10px;
 }
 
 .btn-swh {
     color: #6C6C6C;
     background-color: #EAEAEA;
     border-color: #ddd;
     background-image: linear-gradient(to bottom,#f5f5f5 0,#e8e8e8 100%);
     background-repeat: repeat-x;
     outline: none;
 }
 
 .btn-swh:hover,
 .btn-swh:focus,
 .btn-swh:active,
 .btn-swh.active,
 .open .dropdown-toggle.btn-swh {
     background-color: #e6ebf1;
     background-image: linear-gradient(to bottom,#f1f1f1 0,#e6e6e6 100%);
     border-color: rgb(197, 197, 197);
 }
 
 .btn-swh.disabled,
 .btn-swh[disabled],
 fieldset[disabled] .btn-swh,
 .btn-swh.disabled:hover,
 .btn-swh[disabled]:hover,
 fieldset[disabled] .btn-swh:hover,
 .btn-swh.disabled:focus,
 .btn-swh[disabled]:focus,
 fieldset[disabled] .btn-swh:focus,
 .btn-swh.disabled:active,
 .btn-swh[disabled]:active,
 fieldset[disabled] .btn-swh:active,
 .btn-swh.disabled.active,
 .btn-swh[disabled].active,
 fieldset[disabled] .btn-swh.active {
     background-color: #EAEAEA;
     border-color: #EAEAEA;
 }
 
 .btn-swh .badge {
     color: #EAEAEA;
     background-color: #6C6C6C;
 }
 
 .swh-http-error {
     margin: 0 auto;
     text-align: center;
 }
 
 .swh-http-error-head {
     color: #2d353c;
     font-size: 30px;
 }
 
 .swh-http-error-code {
     bottom: 60%;
     color: #2d353c;
     font-size: 96px;
     line-height: 80px;
     margin-bottom: 10px!important;
 }
 
 .swh-http-error-desc {
     font-size: 12px;
     color: #647788;
     text-align: center;
 }
 
 .swh-http-error-desc pre {
     display: inline-block;
     text-align: left;
     max-width: 800px;
     white-space: pre-wrap;
 }
 
 .swh-table {
     border-bottom: none !important;
 }
 
 .swh-counter {
     font-size: 150%;
 }
 .swh-loading {
     display : none;
 }
 
 .swh-loading.show {
     display:inline-block;
     position: fixed;
     background: white;
     border: 1px solid black;
     top: 50%;
     left: 50%;
     margin: -50px 0px 0px -50px;
     text-align: center;
     z-index:100;
 }
 
 .swh-readme a {
     outline: none;
     border: none;
 }
 
 .swh-readme table {
     border-collapse: collapse;
 }
 
 .swh-readme table,
 .swh-readme table th,
 .swh-readme table td {
     padding: 6px 13px;
     border: 1px solid #dfe2e5;
 }
 
 .swh-readme table tr:nth-child(even) {
     background-color: #f2f2f2;
 }
 
 .swh-web-app-link:hover {
     background-color: #efeff2;
 }
 
 .swh-web-app-link a {
     text-decoration: none;
     outline: none;
     border: none;
 }
 
 .pager a {
     outline: none;
 }
 
 .swh-content {
     background-image: none;
     border: none;
     background-color: white;
 }
 
 .swh-visit-full {
     color: green;
     position: relative;
 }
 
 .swh-visit-full:before {
     content: "\f00c";
     font-family: FontAwesome;
     left:-20px;
     position:absolute;
     top:-2px;
  }
 
 .swh-visit-partial {
     color: #edc344;
     position: relative;
 }
 
 .swh-visit-partial:before {
     content: "\f071";
     font-family: FontAwesome;
     left:-20px;
     position:absolute;
     top:-2px;
  }
 
  .swh-branches-releases {
      min-width: 200px;
  }
 
  .swh-branches-switch,
  .swh-releases-switch {
      padding: 5px 15px !important;
  }
 
  li.swh-branch:hover,
  li.swh-release:hover {
      background-color: #e8e8e8;
  }
 
  .swh-branch a,
  .swh-release a {
      outline:none;
  }
 
  .swh-branch a:hover,
  .swh-release a:hover {
     text-decoration: none;
 }
 
 .swh-origin-visit-details {
     text-align: center;
 }
 
 .swh-origin-visit-details ul {
     list-style: none;
     margin: 0;
     padding: 0;
 }
 
 .swh-origin-visit-details li {
     display: inline-block;
     vertical-align:  middle;
     margin-left: 10px;
     margin-right: 10px;
 }
 
 .swh-browse-nav li a {
     border-radius: 4px;
-}
\ No newline at end of file
+}
+
+.swh-corner-ribbon {
+    width: 200px;
+    background: #e43;
+    position: absolute;
+    top: 25px;
+    left: -50px;
+    text-align: center;
+    line-height: 50px;
+    letter-spacing: 1px;
+    color: #f0f0f0;
+    transform: rotate(-45deg);
+    -webkit-transform: rotate(-45deg);
+    box-shadow: 0 0 3px rgba(0,0,0,.3);
+    top: 25px;
+    right: -50px;
+    left: auto;
+    transform: rotate(45deg);
+    -webkit-transform: rotate(45deg);
+    z-index: 2000;
+  }
\ No newline at end of file
diff --git a/swh/web/templates/browse.html b/swh/web/templates/browse.html
index 67618fdb3..418db6613 100644
--- a/swh/web/templates/browse.html
+++ b/swh/web/templates/browse.html
@@ -1,154 +1,156 @@
 {% extends "layout.html" %}
 {% load swh_templatetags %}
 
 {% block title %}{{ heading }} – Software Heritage archive {% endblock %}
 
 {% block navbar-content %}
   <ul class="nav navbar-nav swh-browse-nav">
     <li class="active">
       <a href="#search" data-toggle="tab" style="outline:none;">Search</a>
     </li>
     <li>
       <a  href="#help" data-toggle="tab" style="outline:none;">Help</a>
     </li>
     <li>
       <a  href="#browse" data-toggle="tab" style="outline:none;">Browse</a>
     </li>
   </ul>
 {% endblock %}
 
 {% block content %}
 
+  <div class="swh-corner-ribbon">Alpha version</div>
+
   <div class="tab-content" style="margin-top: 5px;">
 
     <div class="tab-pane active" id="search">
       {% include "includes/origins-search.html" %}
     </div>
 
     <div class="tab-pane" id="help">
       {% include "includes/browse-help.html" %}
     </div>
 
     <div class="tab-pane" id="browse">
 
       {% if empty_browse %}
 
         <div class="panel panel-default" style="overflow-x: auto;">
           <div class="panel-heading">
             <h2>Browse the Software Heritage archive</h2>
           </div>
           <div class ="panel-body">
             <p>
               No Software Heritage object currently browsed.
               <br/>
               To browse the content of the archive, you can either use
               the <a href="{% url 'browse-homepage' %}#search">Search</a> interface or refer to the URI scheme described
               in the <a href="{% url 'browse-homepage' %}#help">Help</a> page.
             </p>
           </div>
         </div>
 
       {% else %}
 
         <div class="panel-group" id="accordion">
 
           {% block swh-browse-before-panels %}{% endblock %}
 
           {% if top_panel_visible %}
             <div class="panel panel-default" style="overflow-x: auto;">
               <div class="panel-heading">
                 {% if top_panel_collapsible %}
                   <a data-toggle="collapse" data-parent="#accordion" href="#swh-browse-top-collapse" style="outline:none;">
                 {% endif %}
                 <div class="pull-left">
                   <h2>{{ top_panel_text }}</h2>
                 </div>
                 <div class="clearfix"></div>
                 {% if top_panel_collapsible %}
                   </a>
                 {% endif %}
               </div>
               {% if top_panel_collapsible %}
                 <div id="swh-browse-top-collapse" class="panel-collapse collapse">
               {% endif %}
               <table class="table">
                 <tbody>
                   {% for key, val in swh_object_metadata.items|dictsort:"0.lower" %}
                     <tr>
                       <th class="swh-metadata-table-row">{{ key }}</th>
                       <td class="swh-metadata-table-row">
                         <pre>{{ val | safe | urlize_links_and_mails | safe }}</pre>
                       </td>
                     </tr>
                   {% endfor %}
                 </tbody>
               </table>
               {% if top_panel_collapsible %}
                 </div>
               {% endif %}
             </div>
           {% endif %}
 
           {% if main_panel_visible %}
             <div class="panel panel-default" style="overflow-x: auto;">
               {% block swh-browse-main-panel-content %}{% endblock %}
             </div>
           {% endif %}
 
           {% block swh-browse-panels-group-end %}{% endblock %}
 
         </div>
 
         {% block swh-browse-after-panels %}{% endblock %}
 
       </div>
     {% endif %}
 
   </div>
 
   <script>
 
     function removeHash () {
       history.replaceState("", document.title, window.location.pathname + window.location.search);
     }
 
     var browse_tabs_hash = ["#browse", "#search", "#help"];
 
     // Javascript to enable link to tab
     function show_requested_tab() {
       var hash = window.location.hash;
       if (hash && browse_tabs_hash.indexOf(hash) == -1) {
         return;
       }
       if (hash) {
         $('.navbar-nav.swh-browse-nav a[href="' + hash + '"]').tab('show');
       } else {
         $('.navbar-nav.swh-browse-nav a[href="#browse"]').tab('show');
       }
         window.scrollTo(0, 0);
     }
 
     // show requested tab when loading the page
     $(document).ready(function() {
 
       // Change hash for page reload
       $('.navbar-nav.swh-browse-nav a').on('shown.bs.tab', function (e) {
         if (e.target.hash != '#browse') {
           window.location.hash = e.target.hash;
         } else {
           removeHash();
         }
         show_requested_tab();
       });
 
       // update displayed tab when the url fragment changes
       $(window).on('hashchange', function() {
         show_requested_tab();
       });
 
       show_requested_tab();
     });
 
   </script>
 
 {% endblock %}