Summary: ellipse() and circie() from [css-shapes] accept <radial-size>, which has been extend

Summary: Add a value, "chain", to overscroll-behavior property. This is a value which

Hello everyone, We're excited to announce that PerfCompare has launched its simple view! It

An update on this: JPEG XL decoding will be enabled by default in the 158 train rather than the 157

WebKit implemented this feature a few days ago and added more test cases. https://github.com/WebKit/

Summary: CSS is introducing a new functional syntax for newer generic font families: `generic()`.

Hi all, tl;dr: * We have been using new Lando at https://lando.moz.tools/ since early 2025. * We are

Thanks for this intent! I'm obviously supportive. To confirm a few things, Chromium disabled XSLT

As of Firefox 157, I intend to turn the CSS at-rule() function for the @supports at-rule on by

Summary: named-feature() is an @supports function that lets authors detect features that cannot be

Summary: When an anchor element is transformed, the anchor-positioned element's position and size

Hi folks, We've just landed a change[0] that should make life easier for those doing native

As of Firefox 155, we intend to enable the WebAssembly wide arithmetic proposal by default on all

As of Firefox 155, we intend to enable the WebAssembly compact import section encoding by default on

Summary: Change the consumption steps of the Sanitizer API so that it sanitizes during parse steps,

Hey Firefox devs! Migration of Firefox's CI to Github is officially underway. If you inspect the

Summary: Per CSSWG resolution, the `display` property is now discretely animatable, in both CSS

As of Firefox 155, I intend to enable the CSS alpha() relative color function on all platforms. This

Summary: Introduces the <a> element within the MathML namespace exposed via the new

Summary: The CSS at-rule() function for the @supports at-rule allows authors to detect browser

We should add a link to the MDN page for the header in DevTools Netmonitor. Filed https://bugzilla.

Summary: The Audio Session API lets web apps declare their audio intent and observe the system audio

Hi Martin! We are actively looking at a related project called Web Application Integrity, Consistency

Hi all, tl;dr: We are tentatively turning of Try support in old Lando. Please reach out to #Conduit

As of Firefox 155, I intend to turn the CSS progress() function on by default on all platforms. This

Hello, When a patch lands and causes a performance regression in our performance tests, authors are

Cornelius felt strange about thanking himself, but I'd like to point out that he is a volunteer,

As of Firefox 155, I intend to turn advanced attr() on by default on all platforms. It has been

Summary: CSS Typed Arithmetic enhances the type checking capabilities of calc() and other math

As of Firefox 154, I intend to turn the text-box-trim / text-box-edge (and associated text-box