FF149 Relnote: CloseWatcher (mdn#43320)

Tidy expr feat

Author: hamishwillee

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

@@ -329,23 +329,6 @@ The {{cssxref("@custom-media")}} CSS at-rule defines aliases for long or complex
 
 ## APIs
 
-### CloseWatcher Interface
-
-Built-in web components with "open" and "close" semantics, such as modal dialogs and popovers, can be closed using device-native mechanisms.
-For example, on Android you can close a dialog using the back button.
-The {{domxref("CloseWatcher")}} interface allows developers to implement UI components, such as custom sidebars, that can similarly be closed using native mechanisms.
-([Firefox bug 1888729](https://bugzil.la/1888729)).
-
-| Release channel   | Version added | Enabled by default?          |
-| ----------------- | ------------- | ---------------------------- |
-| Nightly           | 140           | Yes (Desktop). No (Android). |
-| Developer Edition | 132           | No                           |
-| Beta              | 132           | No                           |
-| Release           | 132           | No                           |
-
-- `dom.closewatcher.enabled`
-  - : Set to `true` to enable.
-
 ### Removal of `beforescriptexecute` and `afterscriptexecute` events
 
 The non-standard events [`beforescriptexecute`](/en-US/docs/Web/API/Document/beforescriptexecute_event) and [`afterscriptexecute`](/en-US/docs/Web/API/Document/afterscriptexecute_event) on the {{domxref("Document")}} interface, and [`afterscriptexecute`](/en-US/docs/Web/API/Element/afterscriptexecute_event) and [`beforescriptexecute`](/en-US/docs/Web/API/Element/beforescriptexecute_event) on the {{domxref("Element")}} interface are on the path to removal. They have been disabled in Nightly.

files/en-us/mozilla/firefox/releases/149/index.md

@@ -50,9 +50,13 @@ Firefox 149 is the current [Beta version of Firefox](https://www.firefox.com/en-
 
 <!-- #### Removals -->
 
-<!-- ### APIs -->
+### APIs
 
-<!-- #### DOM -->
+#### DOM
+
+- The {{domxref("CloseWatcher")}} interface is now supported.
+  This allows developers to implement components that can be closed using device-native mechanisms, such as the <kbd>Esc</kbd> on Windows or the <kbd>Back</kbd> key on Android, in the same way as built-in components such as [dialogs](/en-US/docs/Web/HTML/Reference/Elements/dialog) and [popovers](/en-US/docs/Web/API/Popover_API).
+  ([Firefox bug 1966073](https://bugzil.la/1966073)).
 
 <!-- #### Media, WebRTC, and Web Audio -->