diff --git a/www/common/toolbar.js b/www/common/toolbar.js
index 810646e24..055e60fb6 100644
--- a/www/common/toolbar.js
+++ b/www/common/toolbar.js
@@ -270,11 +270,11 @@ define([
             'class': 'lag'
         });
         var title;
-        if (typeof lag !== "undefined") {
+        if (lag) {
             lagErrors = 0;
             firstConnection = false;
             title = Messages.lag + ' : ' + lag + ' ms\n';
-            if (lag.waiting || lag > 1000) {
+            if (lag && lag.waiting || lag > 1000) {
                 lagLight.addClass('lag-orange');
                 title += Messages.orangeLight;
             } else {
diff --git a/www/drive/file.css b/www/drive/file.css
index f406bf4c7..4ac44552f 100644
--- a/www/drive/file.css
+++ b/www/drive/file.css
@@ -180,6 +180,9 @@ span.fa-folder-open {
   display: flex;
   flex-flow: column;
 }
+#content.readonly {
+  background: #e6e6e6;
+}
 #content h1 {
   padding-left: 10px;
   margin-top: 10px;
diff --git a/www/drive/file.less b/www/drive/file.less
index 20b7175ca..fd18f54f3 100644
--- a/www/drive/file.less
+++ b/www/drive/file.less
@@ -3,6 +3,7 @@
 @tree-lines-col: #888;
 
 @content-bg: @tree-bg;
+@content-bg-ro: darken(@content-bg, 10%);
 @content-fg: @tree-fg;
 @info-box-bg: #ddddff;
 @info-box-border: #bbb;
@@ -219,6 +220,9 @@ span {
     flex: 1;
     display: flex;
     flex-flow: column;
+    &.readonly {
+        background: @content-bg-ro;
+    }
     h1 {
         padding-left: 10px;
         margin-top: 10px;
diff --git a/www/drive/main.js b/www/drive/main.js
index aa823c968..a6a440354 100644
--- a/www/drive/main.js
+++ b/www/drive/main.js
@@ -18,6 +18,15 @@ define([
     var $iframe = $('#pad-iframe').contents();
     var ifrw = $('#pad-iframe')[0].contentWindow;
 
+    var $tree = $iframe.find("#tree");
+    var $content = $iframe.find("#content");
+    var $driveToolbar = $iframe.find("#driveToolbar");
+    var $contextMenu = $iframe.find("#treeContextMenu");
+    var $contentContextMenu = $iframe.find("#contentContextMenu");
+    var $defaultContextMenu = $iframe.find("#defaultContextMenu");
+    var $trashTreeContextMenu = $iframe.find("#trashTreeContextMenu");
+    var $trashContextMenu = $iframe.find("#trashContextMenu");
+
     Cryptpad.addLoadingScreen();
     var onConnectError = function (info) {
         Cryptpad.errorLoadingScreen(Messages.websocketError);
@@ -127,8 +136,14 @@ define([
 
     var setEditable = function (state) {
         APP.editable = state;
-        if (!state) { $iframe.find('[draggable="true"]').attr('draggable', false); }
-        else { $iframe.find('[draggable="false"]').attr('draggable', true); }
+        if (!state) {
+            $content.addClass('readonly');
+            $iframe.find('[draggable="true"]').attr('draggable', false);
+        }
+        else {
+            $content.removeClass('readonly');
+            $iframe.find('[draggable="false"]').attr('draggable', true);
+        }
     };
 
     // Icons
@@ -196,16 +211,6 @@ define([
         var lastSelectTime;
         var selectedElement;
 
-        var $tree = $iframe.find("#tree");
-        var $content = $iframe.find("#content");
-        var $driveToolbar = $iframe.find("#driveToolbar");
-        var $contextMenu = $iframe.find("#treeContextMenu");
-        var $contentContextMenu = $iframe.find("#contentContextMenu");
-        var $defaultContextMenu = $iframe.find("#defaultContextMenu");
-        var $trashTreeContextMenu = $iframe.find("#trashTreeContextMenu");
-        var $trashContextMenu = $iframe.find("#trashContextMenu");
-
-
         if (!APP.readOnly) {
             setEditable(true);
         }
@@ -1288,7 +1293,10 @@ define([
 
             var $modeButton = createViewModeButton().appendTo($toolbar.find('.rightside'));
             var $title = createTitle(path).appendTo($toolbar.find('.rightside'));
-            createNewButton(isInRoot).appendTo($toolbar.find('.leftside'));
+
+            // NewButton can be undefined if we're in read only mode
+            $toolbar.find('.leftside').append(createNewButton(isInRoot));
+
 
             var $folderHeader = getFolderListHeader();
             var $fileHeader = getFileListHeader(true);