From 6c1df7c1cb839131c0f90d08a21c6d7935cc4de0 Mon Sep 17 00:00:00 2001
From: Dave Letorey <dave@code-red.uk>
Date: Mon, 25 Nov 2024 11:07:40 +0000
Subject: [PATCH] added ff release notes for :has-slotted (#36864)

---
 .../firefox/experimental_features/index.md    | 40 +++++++++++++++++++
 .../mozilla/firefox/releases/133/index.md     |  4 ++
 2 files changed, 44 insertions(+)

diff --git a/files/en-us/mozilla/firefox/experimental_features/index.md b/files/en-us/mozilla/firefox/experimental_features/index.md
index d692ebdcd1aa6dd..f88b7a8b865ccb8 100644
--- a/files/en-us/mozilla/firefox/experimental_features/index.md
+++ b/files/en-us/mozilla/firefox/experimental_features/index.md
@@ -1202,6 +1202,46 @@ The parts that have been implemented include:
   </tbody>
 </table>
 
+### :has-slotted pseudo-class
+
+The {{CSSXRef(":has-slotted")}} [pseudo-class](/en-US/docs/Web/CSS/Pseudo-classes) is used to style elements in {{HTMLElement("template")}} that have content added to a {{HTMLElement("slot")}} element when rendering a [web component](/en-US/docs/Web/API/Web_components) ([Firefox bug 1921747](https://bugzil.la/1921747)).
+
+<table>
+  <thead>
+    <tr>
+      <th>Release channel</th>
+      <th>Version added</th>
+      <th>Enabled by default?</th>
+    </tr>
+  </thead>
+  <tbody>
+    <tr>
+      <th>Nightly</th>
+      <td>133</td>
+      <td>No</td>
+    </tr>
+    <tr>
+      <th>Developer Edition</th>
+      <td>133</td>
+      <td>No</td>
+    </tr>
+    <tr>
+      <th>Beta</th>
+      <td>133</td>
+      <td>No</td>
+    </tr>
+    <tr>
+      <th>Release</th>
+      <td>133</td>
+      <td>No</td>
+    </tr>
+    <tr>
+      <th>Preference name</th>
+      <td colspan="2"><code>layout.css.has-slotted-selector.enabled</code></td>
+    </tr>
+  </tbody>
+</table>
+
 ## SVG
 
 ### SVGPathSeg APIs
diff --git a/files/en-us/mozilla/firefox/releases/133/index.md b/files/en-us/mozilla/firefox/releases/133/index.md
index 46f84b0dbd026ae..b8679dad98ef8d4 100644
--- a/files/en-us/mozilla/firefox/releases/133/index.md
+++ b/files/en-us/mozilla/firefox/releases/133/index.md
@@ -103,6 +103,10 @@ These features are newly shipped in Firefox 133 but are disabled by default. To
 
   The `plaintext-only` value of the [`contenteditable`](/en-US/docs/Web/HTML/Global_attributes/contenteditable) global attribute indicates that the element is editable; rich text formatting is disabled and any formatting in pasted text is automatically stripped. ([Firefox bug 1922723](https://bugzil.la/1922723).)
 
+- **:has-slotted CSS pseudo-class:** `layout.css.has-slotted-selector.enabled`.
+
+  The {{CSSXRef(":has-slotted")}} [pseudo-class](/en-US/docs/Web/CSS/Pseudo-classes) is used to style elements in {{HTMLElement("template")}} that have content added to a {{HTMLElement("slot")}} element when rendering a [web component](/en-US/docs/Web/API/Web_components). ([Firefox bug 1921747](https://bugzil.la/1921747).)
+
 ## Older versions
 
 {{Firefox_for_developers}}