diff --git a/files/en-us/mozilla/firefox/experimental_features/index.md b/files/en-us/mozilla/firefox/experimental_features/index.md
index fb872a5d6f5c4a7..c0a09483a0896e3 100644
--- a/files/en-us/mozilla/firefox/experimental_features/index.md
+++ b/files/en-us/mozilla/firefox/experimental_features/index.md
@@ -364,20 +364,6 @@ The [`@container`](/en-US/docs/Web/CSS/Reference/At-rules/@container) CSS at-rul
 - `layout.css.attr.enabled`
   - : Set to `true` to enable.
 
-### Fix for nested scrollable areas
-
-This implementation has been added in order to fix an issue where scrollable content was unreachable. If a scrollbar is set to `display: none;` or `width: 0;` then the scrollbars of nested scrollable areas would be stacked on top of each other meaning that some of the content may well be unreachable. This does however mean that the `@supports selector(::-webkit-scrollbar)` check will return `true` even though the [`::-webkit-scrollbar`](/en-US/docs/Web/CSS/Reference/Selectors/::-webkit-scrollbar) pseudo-element is not truly supported. ([Firefox bug 1977511](https://bugzil.la/1977511)).
-
-| Release channel   | Version added | Enabled by default? |
-| ----------------- | ------------- | ------------------- |
-| Nightly           | 151           | Yes                 |
-| Developer Edition | 151           | No                  |
-| Beta              | 151           | No                  |
-| Release           | 151           | No                  |
-
-- `layout.css.fake-webkit-scrollbar.enabled`
-  - : Set to `true` to enable.
-
 ### `<timeline-range-name>` values
 
 The {{cssxref("animation-range-start")}}, {{cssxref("animation-range-end")}} CSS properties and {{cssxref("animation-range")}} shorthand property now support [`<timeline-range-name>`](/en-US/docs/Web/CSS/Reference/Values/timeline-range-name) values. These [`<timeline-range-name>`](/en-US/docs/Web/CSS/Guides/Scroll-driven_animations/Timeline_range_names#timeline_range_names) values allow you to precisely state which segment that a scroll driven animation will take place within. ([Firefox bug 1804775](https://bugzil.la/1804775)).
diff --git a/files/en-us/mozilla/firefox/releases/153/index.md b/files/en-us/mozilla/firefox/releases/153/index.md
index f6505ac466b3857..ec923f64322af64 100644
--- a/files/en-us/mozilla/firefox/releases/153/index.md
+++ b/files/en-us/mozilla/firefox/releases/153/index.md
@@ -34,7 +34,9 @@ Firefox 153 is the current [Beta version of Firefox](https://www.firefox.com/en-
 
 <!-- #### Removals -->
 
-<!-- ### CSS -->
+### CSS
+
+- The {{cssxref("::-webkit-scrollbar")}} pseudo-element selector is now recognized, so the `@supports selector(::-webkit-scrollbar)` check returns `true`. Note that this reports the selector as supported even though scrollbar styling via `::-webkit-scrollbar` is not truly implemented. This was added to fix an issue where scrollbars of nested scrollable areas could stack on top of each other. For example, when a scrollbar is set to `display: none` or `width: 0` leaving some content unreachable. ([Firefox bug 2038877](https://bugzil.la/2038877)).
 
 <!-- #### Removals -->