diff --git a/src/pretix/static/bootstrap/scss/bootstrap/_forms.scss b/src/pretix/static/bootstrap/scss/bootstrap/_forms.scss
index d2e2bac5cd..6b05ea1863 100644
--- a/src/pretix/static/bootstrap/scss/bootstrap/_forms.scss
+++ b/src/pretix/static/bootstrap/scss/bootstrap/_forms.scss
@@ -134,7 +134,7 @@ output {
   display: block;
   width: 100%;
   height: $input-height-base; // Make inputs at least the height of their button counterpart (base line-height + padding + border)
-  padding: $padding-base-vertical $padding-base-horizontal;
+  padding: $padding-base-vertical 0 $padding-base-vertical $padding-base-horizontal; // Setting the padding-right to zero, as some versions Firefox render the arrow-buttons on number inputs useless.
   font-size: $font-size-base;
   line-height: $line-height-base;
   color: $input-color;
diff --git a/src/pretix/static/pretixpresale/scss/widget.scss b/src/pretix/static/pretixpresale/scss/widget.scss
index 910c653ec2..691afdc3da 100644
--- a/src/pretix/static/pretixpresale/scss/widget.scss
+++ b/src/pretix/static/pretixpresale/scss/widget.scss
@@ -69,7 +69,7 @@
     border: 1px solid $input-border;
     border-radius: $input-border-radius;
     height: $input-height-base;
-    padding: $padding-base-vertical $padding-base-horizontal;
+    padding: $padding-base-vertical 0 $padding-base-vertical $padding-base-horizontal; // Setting the padding-right to zero, as some versions Firefox render the arrow-buttons on number inputs useless.
     color: $input-color;
     background-color: $input-bg;
     @include box-shadow(inset 0 1px 1px rgba(0, 0, 0, .075));