diff --git a/UNRELEASED.md b/UNRELEASED.md
index c62c1fd9fcf..a4e70a3cb7e 100644
--- a/UNRELEASED.md
+++ b/UNRELEASED.md
@@ -30,6 +30,7 @@ Use [the changelog guidelines](/documentation/Versioning%20and%20changelog.md) t
 - Fixed a bug where the `Checkbox` in a `Combobox` with `allowMultiple` would steal focus and close the `Popover` when clicked ([#4895](https://github.com/Shopify/polaris-react/pull/4895))
 - Fixed an issue where `TextField` was the wrong height on initial render ([#4903](https://github.com/Shopify/polaris-react/pull/4903))
 - Fixed an issue where token values in px weren't converted to rems ([#5000](https://github.com/Shopify/polaris-react/pull/5000))
+- Fixed `display` on `Banner` `secondaryAction` on focus in Firefox ([#5001](https://github.com/Shopify/polaris-react/pull/5001))
 
 ### Documentation
 
diff --git a/src/components/Banner/Banner.scss b/src/components/Banner/Banner.scss
index 691f06b72c1..458e871588f 100644
--- a/src/components/Banner/Banner.scss
+++ b/src/components/Banner/Banner.scss
@@ -260,6 +260,7 @@ $spinner-size: rem(20px);
     @include focus-ring($style: 'focused');
     box-shadow: none;
     background-color: transparent;
+    display: block;
   }
 }