From b54c1ff38dbeda700d17a8a96152eebef3c54e60 Mon Sep 17 00:00:00 2001
From: roytam1 <roytam@gmail.com>
Date: Wed, 7 Jan 2026 23:38:06 +0800
Subject: [PATCH] ported from UXP: Issue #1791 - Part 1: Un-prefix
 `-moz-appearance` (a266b985)

---
 layout/style/nsCSSPropAliasList.h             | 6 +++++-
 layout/style/nsCSSPropList.h                  | 6 +++---
 layout/style/nsComputedDOMStylePropertyList.h | 2 +-
 modules/libpref/init/all.js                   | 1 +
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/layout/style/nsCSSPropAliasList.h b/layout/style/nsCSSPropAliasList.h
index 80ed00c5f..606955943 100644
--- a/layout/style/nsCSSPropAliasList.h
+++ b/layout/style/nsCSSPropAliasList.h
@@ -251,6 +251,10 @@ CSS_PROP_ALIAS(-moz-tab-size,
 	       tab_size,
 	       MozTabSize,
 	       "")
+CSS_PROP_ALIAS(-moz-appearance,
+               appearance,
+               MozAppearance,
+               "layout.css.prefixes.appearance")
 
 CSS_PROP_ALIAS(-moz-user-select,
                user_select,
@@ -298,7 +302,7 @@ CSS_PROP_ALIAS(-webkit-animation-timing-function,
                WEBKIT_PREFIX_PREF)
 
 CSS_PROP_ALIAS(-webkit-appearance,
-               _moz_appearance,
+               appearance,
                WebkitAppearance,
                WEBKIT_PREFIX_PREF)
 
diff --git a/layout/style/nsCSSPropList.h b/layout/style/nsCSSPropList.h
index 5306462e2..d706dfd07 100644
--- a/layout/style/nsCSSPropList.h
+++ b/layout/style/nsCSSPropList.h
@@ -461,9 +461,9 @@ CSS_PROP_DISPLAY(
     CSS_PROP_NO_OFFSET,
     eStyleAnimType_None)
 CSS_PROP_DISPLAY(
-    -moz-appearance,
-    _moz_appearance,
-    CSS_PROP_DOMPROP_PREFIXED(Appearance),
+    appearance,
+    appearance,
+    Appearance,
     CSS_PROPERTY_PARSE_VALUE,
     "",
     VARIANT_HK,
diff --git a/layout/style/nsComputedDOMStylePropertyList.h b/layout/style/nsComputedDOMStylePropertyList.h
index dab7b3814..4de04a87c 100644
--- a/layout/style/nsComputedDOMStylePropertyList.h
+++ b/layout/style/nsComputedDOMStylePropertyList.h
@@ -276,7 +276,7 @@ COMPUTED_STYLE_PROP(z_index,                       ZIndex)
  * Implementations of -moz- styles *
 \* ******************************* */
 
-COMPUTED_STYLE_PROP(_moz_appearance,               Appearance)
+COMPUTED_STYLE_PROP(appearance,                    Appearance)
 COMPUTED_STYLE_PROP(_moz_binding,                  Binding)
 COMPUTED_STYLE_PROP(_moz_border_bottom_colors,     BorderBottomColors)
 COMPUTED_STYLE_PROP(_moz_border_left_colors,       BorderLeftColors)
diff --git a/modules/libpref/init/all.js b/modules/libpref/init/all.js
index 56c7a06b4..ec5bdbdd3 100644
--- a/modules/libpref/init/all.js
+++ b/modules/libpref/init/all.js
@@ -2708,6 +2708,7 @@ pref("layout.css.prefixes.animations", true);
 pref("layout.css.prefixes.box-sizing", true);
 pref("layout.css.prefixes.font-features", true);
 pref("layout.css.prefixes.gradients", true);
+pref("layout.css.prefixes.appearance", true);
 
 // Are webkit-prefixed properties & property-values supported?
 pref("layout.css.prefixes.webkit", true);