diff --git a/app/assets/stylesheets/zammad.scss b/app/assets/stylesheets/zammad.scss
index ad013e182..69a065caf 100644
--- a/app/assets/stylesheets/zammad.scss
+++ b/app/assets/stylesheets/zammad.scss
@@ -1746,17 +1746,6 @@ fieldset {
   }
 }
 
-/*
-
-Firefox Specific Hack
-to fix the overflow of column select with long names
-https://stackoverflow.com/questions/17408815/fieldset-resizes-wrong-appears-to-have-unremovable-min-width-min-content/17863685#17863685
-
-*/
-@-moz-document url-prefix() {
-  fieldset { display: table-cell; }
-}
-
 .form-field-group {
   padding: 20px;
   background: hsl(0,0%,97%);