From 7afff4db6b7dab54dcd0c2f89d7ef7b70992df31 Mon Sep 17 00:00:00 2001
From: Mark Otto <markd.otto@gmail.com>
Date: Sun, 29 Mar 2026 14:05:55 -0700
Subject: [PATCH] Small v6 Reboot updates (#42252)

* Fixes #41700: Remove moz-focus-inner

* Update more Reboot styles to remove button and select text-transform
---
 scss/content/_reboot.scss           | 15 ++-------------
 site/src/content/docs/migration.mdx |  2 ++
 2 files changed, 4 insertions(+), 13 deletions(-)

diff --git a/scss/content/_reboot.scss b/scss/content/_reboot.scss
index 744877bdb7..b43a05089f 100644
--- a/scss/content/_reboot.scss
+++ b/scss/content/_reboot.scss
@@ -441,11 +441,6 @@ $reboot-mark-tokens: defaults(
     line-height: inherit;
   }
 
-  // Remove the inheritance of text transform in Firefox
-  button,
-  select {
-    text-transform: none;
-  }
   // Set the cursor for non-`<button>` buttons
   //
   // Details at https://github.com/twbs/bootstrap/pull/30562
@@ -489,13 +484,6 @@ $reboot-mark-tokens: defaults(
     }
   }
 
-  // Remove inner border and padding from Firefox, but don't restore the outline like Normalize.
-
-  ::-moz-focus-inner {
-    padding: 0;
-    border-style: none;
-  }
-
   // 1. Textareas should really only resize vertically so they don't break their (horizontal) containers.
 
   textarea {
@@ -552,7 +540,8 @@ $reboot-mark-tokens: defaults(
     padding: 0;
   }
 
-  ::-webkit-inner-spin-button {
+  ::-webkit-inner-spin-button,
+  ::-webkit-outer-spin-button {
     height: auto;
   }
 
diff --git a/site/src/content/docs/migration.mdx b/site/src/content/docs/migration.mdx
index f34fb7e356..a2f957b87e 100644
--- a/site/src/content/docs/migration.mdx
+++ b/site/src/content/docs/migration.mdx
@@ -166,6 +166,8 @@ Bootstrap 6 is a major release with many breaking changes to modernize our codeb
 ### Reboot
 
 - Relocated heading classes (like `.h1`) and some type classes (`.mark` and `.small`) to Reboot from `_type.scss`. This avoids a dependency in Sass modules and we like to avoid extending selectors in general.
+- Removed the `::-moz-focus-inner` styles, as the pseudo selector is deprecated in Firefox.
+- Removed `text-transform: none` from `button` and `select` elements, as Firefox no longer incorrectly inherits text-transform.
 
 ### Forms
 
-- 
2.47.3