Firefox 150: absolute elements in multi-column containers and printing (#43772)

* Firefox 150: absolute elements in multi-column containers and printing

* Update files/en-us/mozilla/firefox/releases/150/index.md

Co-authored-by: Dipika Bhattacharya <dipika@foss-community.org>

* Apply suggestions

---------

Co-authored-by: Dipika Bhattacharya <dipika@foss-community.org>

Author: pepelsbey

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

@@ -361,6 +361,22 @@ The [`@container`](/en-US/docs/Web/CSS/Reference/At-rules/@container) CSS at-rul
 - `layout.css.style-queries.enabled`
   - : Set to `true` to enable.
 
+### Absolutely positioned elements in multi-column containers and printing
+
+Absolutely positioned elements inside [multi-column containers](/en-US/docs/Web/CSS/Guides/Multicol_layout) and when printing are now correctly positioned and fragmented.
+This improves interoperability with other browsers and prevents layout issues such as overlapping text or content loss.
+([Firefox bug 2018797](https://bugzil.la/2018797)).
+
+| Release channel   | Version added | Enabled by default? |
+| ----------------- | ------------- | ------------------- |
+| Nightly           | 150           | Yes                 |
+| Developer Edition | 150           | No                  |
+| Beta              | 150           | No                  |
+| Release           | 150           | No                  |
+
+- `layout.abspos.fragmentainer-aware-positioning.enabled`
+  - : Set to `true` to enable.
+
 ## SVG
 
 **No experimental features in this release cycle.**

files/en-us/mozilla/firefox/releases/150/index.md

@@ -114,6 +114,10 @@ These features are shipping in Firefox 150 but are disabled by default.
 To experiment with them, search for the appropriate preference on the `about:config` page and set it to `true`.
 You can find more such features on the [Experimental features](/en-US/docs/Mozilla/Firefox/Experimental_features) page.
 
+- **Absolutely positioned elements in multi-column containers and when printing**: `layout.abspos.fragmentainer-aware-positioning.enabled`
+
+  Absolutely positioned elements inside [multi-column containers](/en-US/docs/Web/CSS/Guides/Multicol_layout) and when printing are now correctly positioned and fragmented. This improves interoperability with other browsers and prevents layout issues such as overlapping text or content loss. ([Firefox bug 2018797](https://bugzil.la/2018797)).
+
 - **Scoped custom element registries**: `dom.scoped-custom-element-registries.enabled`
 
   The {{domxref("CustomElementRegistry","customElementRegistry")}} property is supported on {{domxref("Document")}}, {{domxref("Element")}}, and {{domxref("ShadowRoot")}}.