diff --git a/api/js/etemplate/et2_widget_htmlarea.ts b/api/js/etemplate/et2_widget_htmlarea.ts
index 5fe0779072..92beb13e58 100644
--- a/api/js/etemplate/et2_widget_htmlarea.ts
+++ b/api/js/etemplate/et2_widget_htmlarea.ts
@@ -281,15 +281,6 @@ export class et2_htmlarea extends et2_editableWidget implements et2_IResizeable
 				btoa(egw.preference('rte_font', 'common')+':'+
 					egw.preference('rte_font_size', 'common')+':'+
 					egw.preference('rte_font_unit', 'common')),
-			/*setup : function(ed)
-			{
-				ed.on('init', function()
-				{
-					this.execCommand('fontName', false, egw.preference('rte_font', 'common'));
-					this.execCommand('fontSize', false, <string><unknown>egw.preference('rte_font_size', 'common')
-							+ egw.preference('rte_font_unit', 'common'));
-				});
-			}*/
 		};
 		const rte_formatblock = <string>(egw.preference('rte_formatblock', 'common') || 'p');
 		if (rte_formatblock !== 'p')
@@ -309,9 +300,6 @@ export class et2_htmlarea extends et2_editableWidget implements et2_IResizeable
 			{
 				self.editor.formatter.toggle(<string><unknown>egw.preference('rte_formatblock', 'common'));
 				jQuery(self.editor.editorContainer).height(self.options.height);
-				/*self.editor.execCommand('fontName', false, egw.preference('rte_font', 'common'));
-				self.editor.execCommand('fontSize', false, <string><unknown>egw.preference('rte_font_size', 'common')
-					+ egw.preference('rte_font_unit', 'common'));*/
 				jQuery(self.editor.iframeElement.contentWindow.document).on('dragenter', function(){
 					if (jQuery('#dragover-tinymce').length < 1) jQuery("<style id='dragover-tinymce'>.dragover:after {height:calc(100% - "+jQuery(this).height()+"px) !important;}</style>").appendTo('head');
 				});
diff --git a/api/tinymce.php b/api/tinymce.php
index 791289727f..a4a31267a1 100644
--- a/api/tinymce.php
+++ b/api/tinymce.php
@@ -1,19 +1,16 @@
 <?php
 /**
- * API: loading user preferences and data
- *
- * Usage: /egroupware/api/user.php?user=123
+ * API: loading styles for TinyMCE incl. users preferred font and -size
  *
  * @link www.egroupware.org
- * @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
+ * @author Ralf Becker <rb-at-egroupware.org>
  * @package api
- * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
- * @version $Id$
+ * @license https://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
  */
 
 use EGroupware\Api;
 
-// switch evtl. set output-compression off, as we cant calculate a Content-Length header with transparent compression
+// switch evtl. set output-compression off, as we can't calculate a Content-Length header with transparent compression
 ini_set('zlib.output_compression', 0);
 
 $GLOBALS['egw_info'] = array(
@@ -29,9 +26,9 @@ include '../header.inc.php';
 // release session, as we don't need it, and it blocks parallel requests
 $GLOBALS['egw']->session->commit_session();
 
-// use an etag over output
-$content = Api\Etemplate\Widget\HtmlArea::contentCss();
-$etag = '"'.md5($content).'"';
+// use an etag over user prefs and modification time of HtmlArea
+$etag = '"'.md5(json_encode(array_intersect_key($GLOBALS['egw_info']['user']['preferences']['common'],
+	array_flip(['rtf_font', 'rtf_font_size', 'rtf_font_unit']))).filemtime(__DIR__.'/src/Etemplate/Widget/HtmlArea.php')).'"';
 
 // headers to allow caching, egw_framework specifies etag on url to force reload, even with Expires header
 Api\Session::cache_control(86400);	// cache for 1 day
@@ -45,6 +42,8 @@ if (isset($_SERVER['HTTP_IF_NONE_MATCH']) && $_SERVER['HTTP_IF_NONE_MATCH'] ===
 	exit;
 }
 
+$content = Api\Etemplate\Widget\HtmlArea::contentCss();
+
 // we run our own gzip compression, to set a correct Content-Length of the encoded content
 if (in_array('gzip', explode(',',$_SERVER['HTTP_ACCEPT_ENCODING'])) && function_exists('gzencode'))
 {