added release note for CSSPropertyRule and registerProperty

files/en-us/mozilla/firefox/experimental_features/index.md

@@ -1595,48 +1595,6 @@ See [Firefox bug 1740530](https://bugzil.la/1740530) for more details.
   </tbody>
 </table>
 
-#### CSS Properties and Values API
-
-The [CSS Properties and Values API](/en-US/docs/Web/API/CSS_Properties_and_Values_API) allows developers to register custom CSS properties through JavaScript via [`registerProperty()`](/en-US/docs/Web/API/CSS/registerProperty_static) or in CSS using the [`@property`](/en-US/docs/Web/CSS/@property) at-rule.
-Registering properties using these two methods allows for type checking, default values, and properties that do or do not inherit values from their parent elements.
-See [Firefox bug 1840480](https://bugzil.la/1840480) for more details.
-
-<table>
-  <thead>
-    <tr>
-      <th>Release channel</th>
-      <th>Version added</th>
-      <th>Enabled by default?</th>
-    </tr>
-  </thead>
-  <tbody>
-    <tr>
-      <th>Nightly</th>
-      <td>116</td>
-      <td>Yes</td>
-    </tr>
-    <tr>
-      <th>Developer Edition</th>
-      <td>116</td>
-      <td>No</td>
-    </tr>
-    <tr>
-      <th>Beta</th>
-      <td>116</td>
-      <td>No</td>
-    </tr>
-    <tr>
-      <th>Release</th>
-      <td>116</td>
-      <td>No</td>
-    </tr>
-    <tr>
-      <th>Preference name</th>
-      <td colspan="2"><code>layout.css.property-and-value-api.enabled</code></td>
-    </tr>
-  </tbody>
-</table>
-
 #### CSS Custom Highlight API
 
 The [CSS Custom Highlight API](/en-US/docs/Web/API/CSS_Custom_Highlight_API) provides a mechanism for styling arbitrary text ranges in a document (generalizing the behavior of other highlight pseudo-elements such as {{cssxref('::selection')}}, {{cssxref('::spelling-error')}}, {{cssxref('::grammar-error')}}, and {{cssxref('::target-text')}}).

files/en-us/mozilla/firefox/releases/128/index.md

@@ -20,6 +20,8 @@ This article provides information about the changes in Firefox 128 that affect d
 
 - [Relative color syntax](/en-US/docs/Web/CSS/CSS_colors/Relative_colors) is now enabled by default. Relative color syntax allows you to create a color value relative to an origin color, and can allow you to change a color in a different [color space](/en-US/docs/Glossary/Color_space) using [color functions](/en-US/docs/Web/CSS/CSS_colors#functions) ([Firefox bug 1900251](https://bugzil.la/1900251)).
 - The [`content`](/en-US/docs/Web/CSS/content) property now supports [alternative text](/en-US/docs/Web/CSS/content#alternative_text) for content that includes an image. The alternative text is then exposed to the browsers accessibility tree. (See [Firefox bug 1281158](https://bugzil.la/1281158) and [Firefox bug 1896047](https://bugzil.la/1896047)).
+- The [`CSSPropertyRule`](/en-US/docs/Web/API/CSSPropertyRule) is now supported. This allows you to get the values of a [CSS custom property](/en-US/docs/Web/CSS/--*) set in an [`@property`](/en-US/docs/Web/CSS/@property) at-rule, including [`name`](/en-US/docs/Web/API/CSSPropertyRule/name), [`syntax`](/en-US/docs/Web/API/CSSPropertyRule/syntax), [`inherits`](/en-US/docs/Web/API/CSSPropertyRule/inherits) and [`initialValue`](/en-US/docs/Web/API/CSSPropertyRule/initialvalue) ([Firefox bug 1864818](https://bugzil.la/1864818)).
+- The [`registerProperty`](/en-US/docs/Web/API/CSS/registerProperty_static) is now supported. This allows you to define a [CSS custom property](/en-US/docs/Web/CSS/--*) via JavaScript ([Firefox bug 1864818](https://bugzil.la/1864818)).
 
 #### Removals