diff --git a/src/static/css/iframe_editor.css b/src/static/css/iframe_editor.css
index dba9fe8e..a2930c0f 100644
--- a/src/static/css/iframe_editor.css
+++ b/src/static/css/iframe_editor.css
@@ -76,7 +76,7 @@ body.grayedout { background-color: #eee !important }
 
 body.doesWrap {
   /* white-space: pre-wrap; */ /* Enabling this causes Paste as plain text in Chrome to remove line breaks, this is probably undesirable */
-  word-wrap: break-word;
+  word-wrap: break-word; /* fix for issue #1648 - firefox not wrapping long lines (without spaces) correctly */
 }
 
 #innerdocbody {