Add Firefox 127, update 126, 125

files/en-us/mozilla/firefox/releases/125/index.md

@@ -6,7 +6,7 @@ page-type: firefox-release-notes
 
 {{FirefoxSidebar}}
 
-This article provides information about the changes in Firefox 125 that affect developers. Firefox 125 is the current [Beta version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#beta) and ships on [April 16, 2024](https://whattrainisitnow.com/release/?version=125).
+This article provides information about the changes in Firefox 125 that affect developers. Firefox 125 was released on [April 16, 2024](https://whattrainisitnow.com/release/?version=125).
 
 ## Changes for web developers
 

files/en-us/mozilla/firefox/releases/126/index.md

@@ -6,7 +6,7 @@ page-type: firefox-release-notes
 
 {{FirefoxSidebar}}
 
-This article provides information about the changes in Firefox 126 that affect developers. Firefox 126 is the current [Nightly version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#nightly) and ships on [May 14, 2024](https://whattrainisitnow.com/release/?version=126).
+This article provides information about the changes in Firefox 126 that affect developers. Firefox 126 is the current [Beta version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#beta) and ships on [May 14, 2024](https://whattrainisitnow.com/release/?version=126).
 
 ## Changes for web developers
 

files/en-us/mozilla/firefox/releases/127/index.md

@@ -0,0 +1,71 @@
+---
+title: Firefox 127 for developers
+slug: Mozilla/Firefox/Releases/127
+page-type: firefox-release-notes
+---
+
+{{FirefoxSidebar}}
+
+This article provides information about the changes in Firefox 127 that affect developers. Firefox 127 is the current [Nightly version of Firefox](https://www.mozilla.org/en-US/firefox/channel/desktop/#nightly) and ships on [June 11, 2024](https://whattrainisitnow.com/release/?version=127).
+
+## 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 127 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}}