app/assets/stylesheets/settings/mixins/grid/_grid-framework.sass in oulu-0.12.1 vs app/assets/stylesheets/settings/mixins/grid/_grid-framework.sass in oulu-0.12.2

@@ -18,9 +18,11 @@
   +padding(horizontal, $gutter / 2)
 
 =make-col-span($size, $columns: $grid-columns)
   flex: 0 0 percentage($size / $columns)
   width: percentage($size / $columns)
+  // for firefox bug
+  max-width: percentage($size / $columns)
 
 =make-col-offset($size, $columns: $grid-columns)
   margin-left: percentage($size / $columns)
 
 =make-col-push($size, $columns: $grid-columns)