ryrodriguez25 · pull · Jul 25, 2025 · Jul 25, 2025
diff --git a/files/en-us/mozilla/firefox/releases/140/index.md b/files/en-us/mozilla/firefox/releases/140/index.md
@@ -1,8 +1,8 @@
 ---
 title: Firefox 140 for developers
-short-title: Firefox 140 (Stable)
+short-title: Firefox 140
 slug: Mozilla/Firefox/Releases/140
-page-type: firefox-release-notes-active
+page-type: firefox-release-notes
 sidebar: firefox
 ---
 

diff --git a/files/en-us/mozilla/firefox/releases/141/index.md b/files/en-us/mozilla/firefox/releases/141/index.md
@@ -1,62 +1,37 @@
 ---
 title: Firefox 141 for developers
-short-title: Firefox 141 (Beta)
+short-title: Firefox 141 (Stable)
 slug: Mozilla/Firefox/Releases/141
 page-type: firefox-release-notes-active
 sidebar: firefox
 ---
 
 This article provides information about the changes in Firefox 141 that affect developers.
-Firefox 141 is the current [Beta version of Firefox](https://www.firefox.com/en-US/channel/desktop/#nightly) and ships on [July 22, 2025](https://whattrainisitnow.com/release/?version=141).
-
-> [!NOTE]
-> The release notes for this Firefox version are still a work in progress. You can [view the project tracker for this release here](https://github.com/mdn/mdn/issues/698).
-
-<!-- Authors: Please uncomment any headings you are writing notes for -->
+Firefox 141 was released on [July 22, 2025](https://whattrainisitnow.com/release/?version=141).
 
 ## Changes for web developers
 
-<!-- ### Developer Tools -->
-
 ### HTML
 
 - The HTML [`webkitdirectory`](/en-US/docs/Web/HTML/Reference/Elements/input/file#webkitdirectory) attribute and the corresponding {{domxref("HTMLInputElement.webkitdirectory")}} property are now partially supported on Firefox Android ([Firefox bug 1887878](https://bugzil.la/1887878)).
   The attribute can be set to indicate that an [`<input type="file">`](/en-US/docs/Web/HTML/Reference/Elements/input/file) element should offer selection of directories instead of files.
   Note that the returned file entries for the selected folder always contain an empty string in ({{domxref("File.webkitRelativePath")}}), which means that using `webkitdirectory` is not suitable for use cases where information about the directory structure is needed ([Firefox bug 1973726](https://bugzil.la/1973726)).
 
-<!-- #### Removals -->
-
 ### CSS
 
 - The CSS {{CSSXRef("font-variant-emoji")}} property allows you to set a default presentation style for displaying emojis ([Firefox bug 1954214](https://bugzil.la/1954214)).
 
-<!-- No notable changes. -->
-
-<!-- #### Removals -->
-
 ### JavaScript
 
 - The [`variants`](/en-US/docs/Web/JavaScript/Reference/Global_Objects/Intl/Locale/variants) accessor property is now supported on {{jsxref("Intl.Locale")}} instances.
   This property returns the variants associated with a locale as a string of dash (`-`) separated identifiers.
   It offers a more robust way to get and set variant subtags of a language identifier as opposed to manually parsing or modifying a locale string ([Firefox bug 1970161](https://bugzil.la/1970161)).
 
-<!-- #### Removals -->
-
-<!-- ### SVG -->
-
-<!-- #### Removals -->
-
 ### HTTP
 
 - The [`"cache"`](/en-US/docs/Web/HTTP/Reference/Headers/Clear-Site-Data#cache) directive of the {{httpheader("Clear-Site-Data")}} response header now clears the {{glossary("bfcache")}} (backwards-forwards cache).
   This allows a site to ensure that if anyone navigates backward after a user has signed out, private details that were visible during the initial session will not be exposed. ([Firefox bug 1930501](https://bugzil.la/1930501)).
 
-<!-- #### Removals -->
-
-<!-- ### Security -->
-
-<!-- #### Removals -->
-
 ### APIs
 
 - The {{domxref("PointerEvent/persistentDeviceId","persistentDeviceId")}} property of the {{domxref("PointerEvent")}} interface is now supported. This gives each pointing device that interacts with the screen a unique ID that persists for the session. It provides a reliable way to identify multiple pointing devices (such as pens) interacting with the screen simultaneously. ([Firefox bug 1968400](https://bugzil.la/1968400)).
@@ -72,16 +47,6 @@ Firefox 141 is the current [Beta version of Firefox](https://www.firefox.com/en-
     Unlike `showPopover()` and `hidePopover()`, this does not throw an exception if the popover is already in the target state.
 - The [WebGPU API](/en-US/docs/Web/API/WebGPU_API) is now fully supported on Windows, in all contexts except for service workers. This allows developers to perform computation and graphics rendering using the [Graphics Processing Unit](https://en.wikipedia.org/wiki/Graphics_Processing_Unit) (GPU) of a user's computer. ([Firefox bug 1972486](https://bugzil.la/1972486)).
 
-<!-- #### DOM -->
-
-<!-- #### Media, WebRTC, and Web Audio -->
-
-<!-- #### Removals -->
-
-<!-- ### WebAssembly -->
-
-<!-- #### Removals -->
-
 ### WebDriver conformance (WebDriver BiDi, Marionette)
 
 #### General
@@ -103,11 +68,7 @@ Firefox 141 is the current [Beta version of Firefox](https://www.firefox.com/en-
 
 ## Changes for add-on developers
 
-- Adds the {{WebExtAPIRef('i18n.getPreferredSystemLanguages')}} method to retrieve the preferred locales of the operating system. This complements {{WebExtAPIRef('i18n.getAcceptLanguages')}} which return details of the locales set in the browser. ([Firefox bug 1888486](https://bugzil.la/1888486))
-
-<!-- ### Removals -->
-
-<!-- ### Other -->
+- Adds the {{WebExtAPIRef('i18n.getPreferredSystemLanguages')}} method to retrieve the preferred locales of the operating system. This complements {{WebExtAPIRef('i18n.getAcceptLanguages')}}, which returns details of the locales set in the browser. ([Firefox bug 1888486](https://bugzil.la/1888486))
 
 ## Experimental web features
 

diff --git a/files/en-us/mozilla/firefox/releases/142/index.md b/files/en-us/mozilla/firefox/releases/142/index.md
@@ -1,13 +1,13 @@
 ---
 title: Firefox 142 for developers
-short-title: Firefox 142 (Nightly)
+short-title: Firefox 142 (Beta)
 slug: Mozilla/Firefox/Releases/142
 page-type: firefox-release-notes-active
 sidebar: firefox
 ---
 
 This article provides information about the changes in Firefox 142 that affect developers.
-Firefox 142 is the current [Nightly version of Firefox](https://www.firefox.com/en-US/channel/desktop/#nightly) and ships on [August 19, 2025](https://whattrainisitnow.com/release/?version=141).
+Firefox 142 is the current [Beta version of Firefox](https://www.firefox.com/en-US/channel/desktop/#beta) and ships on [August 19, 2025](https://whattrainisitnow.com/release/?version=142).
 
 > [!NOTE]
 > The release notes for this Firefox version are still a work in progress.

diff --git a/files/en-us/mozilla/firefox/releases/143/index.md b/files/en-us/mozilla/firefox/releases/143/index.md
@@ -0,0 +1,81 @@
+---
+title: Firefox 143 for developers
+short-title: Firefox 143 (Nightly)
+slug: Mozilla/Firefox/Releases/143
+page-type: firefox-release-notes-active
+sidebar: firefox
+---
+
+This article provides information about the changes in Firefox 143 that affect developers.
+Firefox 143 is the current [Nightly version of Firefox](https://www.firefox.com/en-US/channel/desktop/#nightly) and ships on [September 16, 2025](https://whattrainisitnow.com/release/?version=143).
+
+> [!NOTE]
+> The release notes for this Firefox version are still a work in progress.
+
+<!-- Authors: Please uncomment any headings you are writing notes for -->
+
+## Changes for web developers
+
+<!-- ### Developer Tools -->
+
+<!-- ### HTML -->
+
+<!-- No notable changes. -->
+
+<!-- #### Removals -->
+
+<!-- ### CSS -->
+
+<!-- No notable changes. -->
+
+<!-- #### Removals -->
+
+<!-- ### JavaScript -->
+
+<!-- No notable changes. -->
+
+<!-- #### Removals -->
+
+<!-- ### SVG -->
+
+<!-- #### Removals -->
+
+<!-- ### HTTP -->
+
+<!-- #### Removals -->
+
+<!-- ### Security -->
+
+<!-- #### Removals -->
+
+<!-- ### APIs -->
+
+<!-- #### DOM -->
+
+<!-- #### Media, WebRTC, and Web Audio -->
+
+<!-- #### Removals -->
+
+<!-- ### WebAssembly -->
+
+<!-- #### Removals -->
+
+<!-- ### WebDriver conformance (WebDriver BiDi, Marionette) -->
+
+<!-- #### General -->
+
+<!-- #### WebDriver BiDi -->
+
+<!-- #### Marionette -->
+
+<!-- ## Changes for add-on developers -->
+
+<!-- ### Removals -->
+
+<!-- ### Other -->
+
+## Experimental web features
+
+These features are shipping in Firefox 143 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.