* finish task #4580.

module/testcase/css/common.css

@@ -22,6 +22,7 @@
 #steps.sortable-sorting > tr.drag-row > td {background-color: #edf3fe!important}
 #steps.sortable > tr.drop-success > td {background-color: #cfe0ff; transition: background-color 2s;}
 #steps .step-type-toggle {padding: 5px 11px 5px 7px;}
+#steps .step textarea.autosize{resize:none;}
 
 .table-bordered .step-actions {width: 105px;}
 .table-bordered > #steps > tr > td {padding: 0; background-color: #fafafa; border: 1px solid #ddd!important; border-left-style: dotted!important; border-right-style: dotted!important;}

module/testcase/js/common.js

@@ -143,14 +143,17 @@ function setStories()
  */
 function initSteps(selector)
 {
-    if(navigator.userAgent.indexOf("Firefox") < 0)
+    $(document).on('input keyup paste change', 'textarea.autosize', function()
     {
-        $(document).on('input keyup paste change', 'textarea.autosize', function()
+        var height = (this.scrollHeight + 2) + "px";
+        this.style.height = 'auto';
+        this.style.height = height; 
+        $(this).closest('tr').find('textarea').each(function()
         {
-            this.style.height = 'auto';
-            this.style.height = (this.scrollHeight + 2) + "px"; 
+            this.style.height = height; 
         });
-    }
+    });
+
     var $steps = $(selector || '#steps');
     var $stepTemplate = $('#stepTemplate').detach().removeClass('template').attr('id', null);
     var initSortableCallTask = null;