diff --git a/lib/editor/atto/plugins/recordrtc/lang/en/atto_recordrtc.php b/lib/editor/atto/plugins/recordrtc/lang/en/atto_recordrtc.php
index 2377f5e6a41..7477b24be8e 100755
--- a/lib/editor/atto/plugins/recordrtc/lang/en/atto_recordrtc.php
+++ b/lib/editor/atto/plugins/recordrtc/lang/en/atto_recordrtc.php
@@ -31,8 +31,6 @@ $string['audioandvideo'] = 'Audio and video';
 $string['audiobitrate'] = 'Audio bitrate';
 $string['audiobitrate_desc'] = 'Quality of audio recording (larger number means higher quality)';
 $string['audiortc'] = 'Insert audio recording';
-$string['browseralert'] = 'Use Firefox >= 29, Chrome >= 49 or Opera >= 36 for best experience';
-$string['browseralert_title'] = 'Warning!';
 $string['gumabort'] = 'Something strange happened which prevented the webcam/microphone from being used';
 $string['gumabort_title'] = 'Something happened';
 $string['gumnotallowed'] = 'The user must allow the browser access to the webcam/microphone';
diff --git a/lib/editor/atto/plugins/recordrtc/lib.php b/lib/editor/atto/plugins/recordrtc/lib.php
index af0805f335c..d860e85ecf5 100644
--- a/lib/editor/atto/plugins/recordrtc/lib.php
+++ b/lib/editor/atto/plugins/recordrtc/lib.php
@@ -90,8 +90,6 @@ function atto_recordrtc_strings_for_js() {
                      'gumtype',
                      'insecurealert_title',
                      'insecurealert',
-                     'browseralert_title',
-                     'browseralert',
                      'startrecording',
                      'recordagain',
                      'stoprecording',
diff --git a/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-debug.js b/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-debug.js
index 4304b550c6f..12bcf307ec4 100644
--- a/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-debug.js
+++ b/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-debug.js
@@ -52,13 +52,6 @@ YUI.add('moodle-atto_recordrtc-button', function (Y, NAME) {
 var PLUGINNAME = 'atto_recordrtc',
     TEMPLATE = '' +
     '<div class="{{PLUGINNAME}} container-fluid">' +
-      '<div class="{{bs_row}} hide">' +
-        '<div class="{{bs_col}}12">' +
-          '<div id="alert-warning" class="alert {{bs_al_warn}}">' +
-            '<strong>{{browseralert_title}}</strong> {{browseralert}}' +
-          '</div>' +
-        '</div>' +
-      '</div>' +
       '<div class="{{bs_row}} hide">' +
         '<div class="{{bs_col}}12">' +
           '<div id="alert-danger" class="alert {{bs_al_dang}}">' +
@@ -218,7 +211,6 @@ Y.namespace('M.atto_recordrtc').Button = Y.Base.create('button', Y.M.editor_atto
         var isAudio = (type === 'audio'),
             bsRow = 'row',
             bsCol = 'col-xs-',
-            bsAlWarn = 'alert-warning',
             bsAlDang = 'alert-danger',
             bsSsBtn = 'btn btn-lg btn-outline-danger btn-block';
 
@@ -227,12 +219,8 @@ Y.namespace('M.atto_recordrtc').Button = Y.Base.create('button', Y.M.editor_atto
             isAudio: isAudio,
             bs_row: bsRow,
             bs_col: bsCol,
-            bs_al_warn: bsAlWarn,
             bs_al_dang: bsAlDang,
             bs_ss_btn: bsSsBtn,
-            bs_ul_btn: 'btn btn-primary btn-block',
-            browseralert_title: M.util.get_string('browseralert_title', 'atto_recordrtc'),
-            browseralert: M.util.get_string('browseralert', 'atto_recordrtc'),
             insecurealert_title: M.util.get_string('insecurealert_title', 'atto_recordrtc'),
             insecurealert: M.util.get_string('insecurealert', 'atto_recordrtc'),
             startrecording: M.util.get_string('startrecording', 'atto_recordrtc'),
diff --git a/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-min.js b/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-min.js
index b22342e1bb8..5a5a7318ac2 100644
--- a/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-min.js
+++ b/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button-min.js
@@ -1 +1 @@
-YUI.add("moodle-atto_recordrtc-button",function(e,t){var n="atto_recordrtc",r='<div class="{{PLUGINNAME}} container-fluid"><div class="{{bs_row}} hide"><div class="{{bs_col}}12"><div id="alert-warning" class="alert {{bs_al_warn}}"><strong>{{browseralert_title}}</strong> {{browseralert}}</div></div></div><div class="{{bs_row}} hide"><div class="{{bs_col}}12"><div id="alert-danger" class="alert {{bs_al_dang}}"><strong>{{insecurealert_title}}</strong> {{insecurealert}}</div></div></div><div class="{{bs_row}} hide">{{#if isAudio}}<div class="{{bs_col}}1"></div><div class="{{bs_col}}10"><audio id="player"></audio></div><div class="{{bs_col}}1"></div>{{else}}<div class="{{bs_col}}12"><video id="player"></video></div>{{/if}}</div><div class="{{bs_row}}"><div class="{{bs_col}}1"></div><div class="{{bs_col}}10"><button id="start-stop" class="{{bs_ss_btn}}">{{startrecording}}</button></div><div class="{{bs_col}}1"></div></div><div class="{{bs_row}} hide"><div class="{{bs_col}}3"></div><div class="{{bs_col}}6"><button id="upload" class="btn btn-primary btn-block">{{attachrecording}}</button></div><div class="{{bs_col}}3"></div></div></div>';e.namespace("M.atto_recordrtc").Button=e.Base.create("button",e.M.editor_atto.EditorPlugin,[],{_lang:"en",initializer:function(){if(this.get("host").canShowFilepicker("media")){var e=this.get("allowedtypes");(e==="both"||e==="audio")&&this._addButton("audio",this._audio),(e==="both"||e==="video")&&this._addButton("video",this._video);var t=this.getDialogue({width:1e3,focusAfterHide:null});t.after("visibleChange",function(){var e=!t.get("visible"),n=M.atto_recordrtc.commonmodule;e&&(window.clearInterval(n.countdownTicker),n.mediaRecorder&&n.mediaRecorder.state!=="inactive"&&n.mediaRecorder.stop(),n.stream&&n.stream.getTracks().forEach(function(e){e.readyState!=="ended"&&e.stop()}))}),t.on("click",function(){this.centered()}),window.require(["core/adapter"],function(e){window.adapter=e})}},_addButton:function(e,t){this.addButton({buttonName:e,icon:this.get(e+"rtcicon"),iconComponent:n,callback:t,title:e+"rtc",tags:e+"rtc",tagMatchRequiresAll:!1})},_audio:function(){var e=this.getDialogue();e.set("headerContent",M.util.get_string("audiortc","atto_recordrtc")),e.set("bodyContent",this._createContent("audio")),e.show(),M.atto_recordrtc.audiomodule.init(this)},_video:function(){var e=this.getDialogue();e.set("headerContent",M.util.get_string("videortc","atto_recordrtc")),e.set("bodyContent",this._createContent("video")),e.show(),M.atto_recordrtc.videomodule.init(this)},_createContent:function(t){var i=t==="audio",s="row",o="col-xs-",u="alert-warning",a="alert-danger",f="btn btn-lg btn-outline-danger btn-block",l=e.Handlebars.compile(r)({PLUGINNAME:n,isAudio:i,bs_row:s,bs_col:o,bs_al_warn:u,bs_al_dang:a,bs_ss_btn:f,bs_ul_btn:"btn btn-primary btn-block",browseralert_title:M.util.get_string("browseralert_title","atto_recordrtc"),browseralert:M.util.get_string("browseralert","atto_recordrtc"),insecurealert_title:M.util.get_string("insecurealert_title","atto_recordrtc"),insecurealert:M.util.get_string("insecurealert","atto_recordrtc"),startrecording:M.util.get_string("startrecording","atto_recordrtc"),attachrecording:M.util.get_string("attachrecording","atto_recordrtc")});return l},closeDialogue:function(e){e.getDialogue().hide(),e.editor.focus()},setLink:function(e,t){e.getDialogue().hide(),e.editor.focus(),e.get("host").insertContentAtFocusPoint(t),e.markUpdated()}},{ATTRS:{contextid:{value:null},sesskey:{value:null},allowedtypes:{value:null},audiobitrate:{value:null},videobitrate:{value:null},timelimit:{value:null},audiortcicon:{value:null},videortcicon:{value:null},maxrecsize:{value:null}}})},"@VERSION@",{requires:["moodle-editor_atto-plugin","moodle-atto_recordrtc-recording"]});
+YUI.add("moodle-atto_recordrtc-button",function(e,t){var n="atto_recordrtc",r='<div class="{{PLUGINNAME}} container-fluid"><div class="{{bs_row}} hide"><div class="{{bs_col}}12"><div id="alert-danger" class="alert {{bs_al_dang}}"><strong>{{insecurealert_title}}</strong> {{insecurealert}}</div></div></div><div class="{{bs_row}} hide">{{#if isAudio}}<div class="{{bs_col}}1"></div><div class="{{bs_col}}10"><audio id="player"></audio></div><div class="{{bs_col}}1"></div>{{else}}<div class="{{bs_col}}12"><video id="player"></video></div>{{/if}}</div><div class="{{bs_row}}"><div class="{{bs_col}}1"></div><div class="{{bs_col}}10"><button id="start-stop" class="{{bs_ss_btn}}">{{startrecording}}</button></div><div class="{{bs_col}}1"></div></div><div class="{{bs_row}} hide"><div class="{{bs_col}}3"></div><div class="{{bs_col}}6"><button id="upload" class="btn btn-primary btn-block">{{attachrecording}}</button></div><div class="{{bs_col}}3"></div></div></div>';e.namespace("M.atto_recordrtc").Button=e.Base.create("button",e.M.editor_atto.EditorPlugin,[],{_lang:"en",initializer:function(){if(this.get("host").canShowFilepicker("media")){var e=this.get("allowedtypes");(e==="both"||e==="audio")&&this._addButton("audio",this._audio),(e==="both"||e==="video")&&this._addButton("video",this._video);var t=this.getDialogue({width:1e3,focusAfterHide:null});t.after("visibleChange",function(){var e=!t.get("visible"),n=M.atto_recordrtc.commonmodule;e&&(window.clearInterval(n.countdownTicker),n.mediaRecorder&&n.mediaRecorder.state!=="inactive"&&n.mediaRecorder.stop(),n.stream&&n.stream.getTracks().forEach(function(e){e.readyState!=="ended"&&e.stop()}))}),t.on("click",function(){this.centered()}),window.require(["core/adapter"],function(e){window.adapter=e})}},_addButton:function(e,t){this.addButton({buttonName:e,icon:this.get(e+"rtcicon"),iconComponent:n,callback:t,title:e+"rtc",tags:e+"rtc",tagMatchRequiresAll:!1})},_audio:function(){var e=this.getDialogue();e.set("headerContent",M.util.get_string("audiortc","atto_recordrtc")),e.set("bodyContent",this._createContent("audio")),e.show(),M.atto_recordrtc.audiomodule.init(this)},_video:function(){var e=this.getDialogue();e.set("headerContent",M.util.get_string("videortc","atto_recordrtc")),e.set("bodyContent",this._createContent("video")),e.show(),M.atto_recordrtc.videomodule.init(this)},_createContent:function(t){var i=t==="audio",s="row",o="col-xs-",u="alert-danger",a="btn btn-lg btn-outline-danger btn-block",f=e.Handlebars.compile(r)({PLUGINNAME:n,isAudio:i,bs_row:s,bs_col:o,bs_al_dang:u,bs_ss_btn:a,insecurealert_title:M.util.get_string("insecurealert_title","atto_recordrtc"),insecurealert:M.util.get_string("insecurealert","atto_recordrtc"),startrecording:M.util.get_string("startrecording","atto_recordrtc"),attachrecording:M.util.get_string("attachrecording","atto_recordrtc")});return f},closeDialogue:function(e){e.getDialogue().hide(),e.editor.focus()},setLink:function(e,t){e.getDialogue().hide(),e.editor.focus(),e.get("host").insertContentAtFocusPoint(t),e.markUpdated()}},{ATTRS:{contextid:{value:null},sesskey:{value:null},allowedtypes:{value:null},audiobitrate:{value:null},videobitrate:{value:null},timelimit:{value:null},audiortcicon:{value:null},videortcicon:{value:null},maxrecsize:{value:null}}})},"@VERSION@",{requires:["moodle-editor_atto-plugin","moodle-atto_recordrtc-recording"]});
diff --git a/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button.js b/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button.js
index 4304b550c6f..12bcf307ec4 100644
--- a/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button.js
+++ b/lib/editor/atto/plugins/recordrtc/yui/build/moodle-atto_recordrtc-button/moodle-atto_recordrtc-button.js
@@ -52,13 +52,6 @@ YUI.add('moodle-atto_recordrtc-button', function (Y, NAME) {
 var PLUGINNAME = 'atto_recordrtc',
     TEMPLATE = '' +
     '<div class="{{PLUGINNAME}} container-fluid">' +
-      '<div class="{{bs_row}} hide">' +
-        '<div class="{{bs_col}}12">' +
-          '<div id="alert-warning" class="alert {{bs_al_warn}}">' +
-            '<strong>{{browseralert_title}}</strong> {{browseralert}}' +
-          '</div>' +
-        '</div>' +
-      '</div>' +
       '<div class="{{bs_row}} hide">' +
         '<div class="{{bs_col}}12">' +
           '<div id="alert-danger" class="alert {{bs_al_dang}}">' +
@@ -218,7 +211,6 @@ Y.namespace('M.atto_recordrtc').Button = Y.Base.create('button', Y.M.editor_atto
         var isAudio = (type === 'audio'),
             bsRow = 'row',
             bsCol = 'col-xs-',
-            bsAlWarn = 'alert-warning',
             bsAlDang = 'alert-danger',
             bsSsBtn = 'btn btn-lg btn-outline-danger btn-block';
 
@@ -227,12 +219,8 @@ Y.namespace('M.atto_recordrtc').Button = Y.Base.create('button', Y.M.editor_atto
             isAudio: isAudio,
             bs_row: bsRow,
             bs_col: bsCol,
-            bs_al_warn: bsAlWarn,
             bs_al_dang: bsAlDang,
             bs_ss_btn: bsSsBtn,
-            bs_ul_btn: 'btn btn-primary btn-block',
-            browseralert_title: M.util.get_string('browseralert_title', 'atto_recordrtc'),
-            browseralert: M.util.get_string('browseralert', 'atto_recordrtc'),
             insecurealert_title: M.util.get_string('insecurealert_title', 'atto_recordrtc'),
             insecurealert: M.util.get_string('insecurealert', 'atto_recordrtc'),
             startrecording: M.util.get_string('startrecording', 'atto_recordrtc'),
diff --git a/lib/editor/atto/plugins/recordrtc/yui/src/button/js/button.js b/lib/editor/atto/plugins/recordrtc/yui/src/button/js/button.js
index a622072a0ee..37c172a5da2 100755
--- a/lib/editor/atto/plugins/recordrtc/yui/src/button/js/button.js
+++ b/lib/editor/atto/plugins/recordrtc/yui/src/button/js/button.js
@@ -50,13 +50,6 @@
 var PLUGINNAME = 'atto_recordrtc',
     TEMPLATE = '' +
     '<div class="{{PLUGINNAME}} container-fluid">' +
-      '<div class="{{bs_row}} hide">' +
-        '<div class="{{bs_col}}12">' +
-          '<div id="alert-warning" class="alert {{bs_al_warn}}">' +
-            '<strong>{{browseralert_title}}</strong> {{browseralert}}' +
-          '</div>' +
-        '</div>' +
-      '</div>' +
       '<div class="{{bs_row}} hide">' +
         '<div class="{{bs_col}}12">' +
           '<div id="alert-danger" class="alert {{bs_al_dang}}">' +
@@ -216,7 +209,6 @@ Y.namespace('M.atto_recordrtc').Button = Y.Base.create('button', Y.M.editor_atto
         var isAudio = (type === 'audio'),
             bsRow = 'row',
             bsCol = 'col-xs-',
-            bsAlWarn = 'alert-warning',
             bsAlDang = 'alert-danger',
             bsSsBtn = 'btn btn-lg btn-outline-danger btn-block';
 
@@ -225,12 +217,8 @@ Y.namespace('M.atto_recordrtc').Button = Y.Base.create('button', Y.M.editor_atto
             isAudio: isAudio,
             bs_row: bsRow,
             bs_col: bsCol,
-            bs_al_warn: bsAlWarn,
             bs_al_dang: bsAlDang,
             bs_ss_btn: bsSsBtn,
-            bs_ul_btn: 'btn btn-primary btn-block',
-            browseralert_title: M.util.get_string('browseralert_title', 'atto_recordrtc'),
-            browseralert: M.util.get_string('browseralert', 'atto_recordrtc'),
             insecurealert_title: M.util.get_string('insecurealert_title', 'atto_recordrtc'),
             insecurealert: M.util.get_string('insecurealert', 'atto_recordrtc'),
             startrecording: M.util.get_string('startrecording', 'atto_recordrtc'),