Firefox 134 release notes (#37527)

* firefox rel notes 134

* Update files/en-us/mozilla/firefox/releases/136/index.md

---------

Co-authored-by: Brian Smith <[email protected]>

files/en-us/mozilla/firefox/releases/134/index.md

@@ -6,43 +6,25 @@ page-type: firefox-release-notes
 
 {{FirefoxSidebar}}
 
-This article provides information about the changes in Firefox 134 that affect developers. Firefox 134 is the current [Beta version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#beta) and ships on [January 7, 2025](https://whattrainisitnow.com/release/?version=134).
+This article provides information about the changes in Firefox 134 that affect developers. Firefox 134 was released on [January 7, 2025](https://whattrainisitnow.com/release/?version=134).
 
 ## Changes for web developers
 
-### Developer Tools
-
 ### HTML
 
-#### Removals
+No notable changes
 
 ### CSS
 
 - The {{CSSXRef("align-self")}} and {{CSSXRef("justify-self")}} CSS properties and {{CSSXRef("place-self")}} CSS shorthand property are now supported for [absolutely positioned](/en-US/docs/Learn_web_development/Core/CSS_layout/Positioning#absolute_positioning) elements. ([Firefox bug 1920160](https://bugzil.la/1920160)).
 
-#### Removals
-
 ### JavaScript
 
 - Support for the {{jsxref("RegExp.escape()")}} static method that can be used to escape any potential regex syntax characters in a string, returning a new string that can be safely used as a [literal](/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Literal_character) pattern for the {{jsxref("RegExp/RegExp", "RegExp()")}} constructor. ([Firefox bug 1918235](https://bugzil.la/1918235)).
 - The {{jsxref("Promise.try()")}} convenience method is now supported.
   The method takes a callback of any kind (a function that returns or throws, synchronously or asynchronously) and wraps its result in a {{jsxref("Promise")}}.
   This allows you to use promise semantics ({{jsxref("Promise.then", ".then()")}}, {{jsxref("Promise.catch", ".catch()")}}) to handle the result from any kind of method. ([Firefox bug 1917879](https://bugzil.la/1917879) and [Firefox bug 1905364](https://bugzil.la/1905364)).
 
-#### Removals
-
-### SVG
-
-#### Removals
-
-### HTTP
-
-#### Removals
-
-### Security
-
-#### Removals
-
 ### APIs
 
 - The [`PushManager.supportedContentEncodings`](/en-US/docs/Web/API/PushManager/supportedContentEncodings_static) static method is now supported for getting the allowed algorithms for encrypting the payload of a [push message](/en-US/docs/Web/API/Push_API). ([Firefox bug 1497430](https://bugzil.la/1497430)).
@@ -55,12 +37,6 @@ This article provides information about the changes in Firefox 134 that affect d
 
 - WebRTC simulcast of screen-shared video with the [VP8 codec](/en-US/docs/Web/Media/Formats/Video_codecs#vp8) is now supported (simulcast from other video sources has been enabled for a long time). More precisely, {{domxref("MediaStreamTrack")}} objects for screen and window capture (for example, from {{domxref("MediaDevices.getDisplayMedia()")}}), can now be encoded as multiple simulcast layers when using VP8. ([Firefox bug 1692873](https://bugzil.la/1692873)).
 
-#### Removals
-
-### WebAssembly
-
-#### Removals
-
 ### WebDriver conformance (WebDriver BiDi, Marionette)
 
 #### WebDriver BiDi
@@ -77,12 +53,6 @@ This article provides information about the changes in Firefox 134 that affect d
 - The `Addon:Install` and `Addon:Uninstall` commands are now available for GeckoView (Firefox for Android) ([Firefox bug 1806135](https://bugzilla.mozilla.org/show_bug.cgi?id=1806135)).
 - The `Addon:Install` command can now be used to install extensions enabled in Private Browsing mode ([Firefox bug 1810718](https://bugzilla.mozilla.org/show_bug.cgi?id=1810718))
 
-## Changes for add-on developers
-
-### Removals
-
-### Other
-
 ## Experimental web features
 
 These features are newly shipped in Firefox 134 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.

files/en-us/mozilla/firefox/releases/135/index.md

@@ -6,7 +6,7 @@ page-type: firefox-release-notes
 
 {{FirefoxSidebar}}
 
-This article provides information about the changes in Firefox 135 that affect developers. Firefox 135 is the current [Nightly version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#nightly) and ships on [February 4, 2025](https://whattrainisitnow.com/release/?version=135).
+This article provides information about the changes in Firefox 135 that affect developers. Firefox 135 is the current [Beta version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#nightly) and ships on [February 4, 2025](https://whattrainisitnow.com/release/?version=135).
 
 ## Changes for web developers
 

files/en-us/mozilla/firefox/releases/136/index.md

@@ -0,0 +1,71 @@
+---
+title: Firefox 136 for developers
+slug: Mozilla/Firefox/Releases/136
+page-type: firefox-release-notes
+---
+
+{{FirefoxSidebar}}
+
+This article provides information about the changes in Firefox 136 that affect developers. Firefox 136 is the current [Nightly version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#nightly) and ships on [March 4, 2025](https://whattrainisitnow.com/release/?version=136).
+
+## Changes for web developers
+
+### Developer Tools
+
+### HTML
+
+#### Removals
+
+### CSS
+
+#### Removals
+
+### JavaScript
+
+#### 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 newly shipped in Firefox 136 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.
+
+## Older versions
+
+{{Firefox_for_developers}}