diff --git a/js/h5p.js b/js/h5p.js
index 4fa0e19..df0d9e6 100644
--- a/js/h5p.js
+++ b/js/h5p.js
@@ -139,7 +139,7 @@ H5P.init = function (target) {
 
     // Check if we should add and display a fullscreen button for this H5P.
     if (contentData.fullScreen == 1 && H5P.canHasFullScreen) {
-      H5P.jQuery('<div class="h5p-content-controls"><div role="button" tabindex="1" class="h5p-enable-fullscreen" title="' + H5P.t('fullscreen') + '"></div></div>').prependTo($container).children().click(function () {
+      H5P.jQuery('<div class="h5p-content-controls"><div role="button" tabindex="0" class="h5p-enable-fullscreen" title="' + H5P.t('fullscreen') + '"></div></div>').prependTo($container).children().click(function () {
         H5P.fullScreen($container, instance);
       });
     }
@@ -148,7 +148,7 @@ H5P.init = function (target) {
     var $actions = H5P.jQuery('<ul class="h5p-actions"></ul>');
     if (!(contentData.disable & H5P.DISABLE_DOWNLOAD)) {
       // Add export button
-      H5P.jQuery('<li class="h5p-button h5p-export" role="button" tabindex="1" title="' + H5P.t('downloadDescription') + '">' + H5P.t('download') + '</li>').appendTo($actions).click(function () {
+      H5P.jQuery('<li class="h5p-button h5p-export" role="button" tabindex="0" title="' + H5P.t('downloadDescription') + '">' + H5P.t('download') + '</li>').appendTo($actions).click(function () {
         window.location.href = contentData.exportUrl;
       });
     }
@@ -157,7 +157,7 @@ H5P.init = function (target) {
 
       if (copyright) {
         // Add copyright dialog button
-        H5P.jQuery('<li class="h5p-button h5p-copyrights" role="button" tabindex="1" title="' + H5P.t('copyrightsDescription') + '">' + H5P.t('copyrights') + '</li>').appendTo($actions).click(function () {
+        H5P.jQuery('<li class="h5p-button h5p-copyrights" role="button" tabindex="0" title="' + H5P.t('copyrightsDescription') + '">' + H5P.t('copyrights') + '</li>').appendTo($actions).click(function () {
           // Open dialog with copyright information
           var dialog = new H5P.Dialog('copyrights', H5P.t('copyrightInformation'), copyright, $container);
           dialog.open();
@@ -166,7 +166,7 @@ H5P.init = function (target) {
     }
     if (!(contentData.disable & H5P.DISABLE_EMBED)) {
       // Add embed button
-      H5P.jQuery('<li class="h5p-button h5p-embed" role="button" tabindex="1" title="' + H5P.t('embedDescription') + '">' + H5P.t('embed') + '</li>').appendTo($actions).click(function () {
+      H5P.jQuery('<li class="h5p-button h5p-embed" role="button" tabindex="0" title="' + H5P.t('embedDescription') + '">' + H5P.t('embed') + '</li>').appendTo($actions).click(function () {
         H5P.openEmbedDialog($actions, contentData.embedCode, contentData.resizeCode, {
           width: $element.width(),
           height: $element.height()
@@ -545,7 +545,7 @@ H5P.fullScreen = function ($element, instance, exitCallback, body) {
     }
 
     before('h5p-semi-fullscreen');
-    var $disable = H5P.jQuery('<div role="button" tabindex="1" class="h5p-disable-fullscreen" title="' + H5P.t('disableFullscreen') + '"></div>').appendTo($container.find('.h5p-content-controls'));
+    var $disable = H5P.jQuery('<div role="button" tabindex="0" class="h5p-disable-fullscreen" title="' + H5P.t('disableFullscreen') + '"></div>').appendTo($container.find('.h5p-content-controls'));
     var keyup, disableSemiFullscreen = H5P.exitFullScreen = function () {
       if (prevViewportContent) {
         // Use content from the previous viewport tag
@@ -887,7 +887,7 @@ H5P.Dialog = function (name, title, content, $element) {
                               <div class="h5p-inner">\
                                 <h2>' + title + '</h2>\
                                 <div class="h5p-scroll-content">' + content + '</div>\
-                                <div class="h5p-close" role="button" tabindex="1" title="' + H5P.t('close') + '">\
+                                <div class="h5p-close" role="button" tabindex="0" title="' + H5P.t('close') + '">\
                               </div>\
                             </div>')
     .insertAfter($element)