diff --git a/scripts/expire-channels.js b/scripts/expire-channels.js
index 9151398d2..8f9d9f87e 100644
--- a/scripts/expire-channels.js
+++ b/scripts/expire-channels.js
@@ -10,7 +10,7 @@ nThen(function (w) {
         config.log = _log;
     }));
 }).nThen(function (w) {
-    FileStorage.create(config, w(function (_store) {
+    FileStorage.create(config, w(function (err, _store) {
         config.store = _store;
 
         // config.taskPath
diff --git a/www/pad/comment.js b/www/pad/comment.js
index 996b153dd..9936d5e46 100644
--- a/www/pad/comment.js
+++ b/www/pad/comment.js
@@ -13,6 +13,18 @@
         return b;
     }
 
+    // COPYPASTED from mediatag-plugin-dialog.js
+    var isReadOnly = function (el) {
+        if (!el) { return; }
+        var parent = el;
+        while (parent) {
+            if (parent.nodeName.toUpperCase() === 'BODY') {
+                return parent.getAttribute("contenteditable") === 'false';
+            }
+            parent = parent.parentElement;
+        }
+    };
+
     var color1 = 'rgba(249, 230, 65, 1.0)';
     var color2 = 'rgba(252, 181, 0, 1.0)';
 
@@ -44,7 +56,10 @@
                 path = path || editor.elementPath();
                 sel = sel || editor.getSelection();
                 var applicable = removeStyle.checkApplicable(path, editor);
-                var hasComments = editor.getSelectedHtml().$.querySelectorAll('comment').length;
+                var selectedHtml = editor.getSelectedHtml();
+                if (selectedHtml === null) { return; }
+                var comments = selectedHtml.$.querySelectorAll('comment');
+                var hasComments = comments && comments.length;
                 var isComment = removeStyle.checkActive(path, editor);
                 var empty = !sel.getSelectedText();
                 return applicable && !empty && !hasComments && !isComment;
@@ -164,7 +179,8 @@
                 */
                 editor.contextMenu.addListener(function(element, sel, path) {
                     var applicable = isApplicable(path, sel);
-                    if (!applicable) { return; }
+                    if (!applicable || isReadOnly(element.$)) { return; }
+
                     return {
                         comment: CKEDITOR.TRISTATE_OFF,
                     };
diff --git a/www/pad/comments.js b/www/pad/comments.js
index da98ceeb2..1e6f37259 100644
--- a/www/pad/comments.js
+++ b/www/pad/comments.js
@@ -747,6 +747,14 @@ define([
         Env.$contentContainer.append(h('div.cp-comment-bubble', button));
     };
 
+    var isEditable = function (document) {
+        try {
+            return document.body.getAttribute('contenteditable') === 'true';
+        } catch (err) {
+            return false;
+        }
+    };
+
     var addAddCommentHandler = function(Env) {
         Env.editor.plugins.comments.addComment = function(uid, addMark) {
             if (!Env.ready) { return; }
@@ -809,7 +817,7 @@ define([
         $(Env.ifrWindow.document).on('selectionchange', function() {
             removeCommentBubble(Env);
             var applicable = Env.editor.plugins.comments.isApplicable();
-            if (!applicable) { return; }
+            if (!applicable || !isEditable(Env.ifrWindow.document)) { return; }
             addCommentBubble(Env);
         });
     };