diff --git a/css/shiny.css b/css/shiny.css
index 017cc41a8c528a3491807f801a8bbc6ea03d0ee6..230a3e34bcf26d3ce45ceafe3e81f7401c274b38 100644
--- a/css/shiny.css
+++ b/css/shiny.css
@@ -769,6 +769,13 @@ table.sticky-header th {
   border-bottom: 0;
 }
 
+/* Firefox fix for Sticky Table Headers */
+@-moz-document url-prefix() {
+  table.sticky-header thead {
+    display: table-header-group !important;
+  }
+}
+
 form .field-multiple-table {
   margin-bottom: 10px;
 }
diff --git a/scss/shiny.scss b/scss/shiny.scss
index 5fb243b02a42e890c113e5a405230a3ecae37f1a..49309d68a568e763f473300aedfd6d55a8c761d8 100644
--- a/scss/shiny.scss
+++ b/scss/shiny.scss
@@ -569,10 +569,17 @@ table.sticky-header {
   -moz-box-shadow: 0 1px 1px #bebfb9;
   -webkit-box-shadow: 0 1px 1px #bebfb9;
   box-shadow: 0 1px 1px #bebfb9;
+
   th {
     border-bottom: 0;
   }
 }
+/* Firefox fix for Sticky Table Headers */
+@-moz-document url-prefix() {
+  table.sticky-header thead {
+    display: table-header-group !important;
+  }
+}
 form .field-multiple-table {
   margin-bottom: 10px;