 <p>This is incorrect:</p> <pre><code>CKEDITOR.editorConfig = function(config) { config.extraPlugins = 'timestamp'; config.extraPlugins = 'sharedspace'; }; </code></pre> <p>You first set <code>extraPlugins</code> to <code>'timestamp'</code> and right after that you set it to <code>'sharedspace'</code>. You need to set it once, with both values:</p> <pre><code>CKEDITOR.editorConfig = function(config) { config.extraPlugins = 'timestamp,sharedspace'; }; </code></pre>