dev-platform@mozilla.org

Summary: The CSS Inline Layout Module Level 3 specification converts the existing vertical-align

Summary: An imperative API for accessibility notifications as a more ergonomic and reliable

Summary: The new colorspace and alpha attributes controls the output by color picking, eg using the

Welcome to the Q4 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness

That's great to hear, really looking forward being able to do more with selects :) I filed https:

The version bump to 149 has now landed on mozilla-central and the soft freeze period is over. Thanks,

On Tue, Dec 23, 2025 at 4:28 PM 'Kagami Rosylight' via dev-pl...@mozilla.org <dev-

Summary: `HTMLMediaElement.captureStream()` is a standards-based API that exposes a `MediaStream`

As of 2025-12-21 I intend to replace the current platform-specific color picker with a common cross-

No bug yet, but a WIP patch for folks to try is here: https://phabricator.services.mozilla.com/

As of Firefox 148, we intend to turn on the HTML Sanitizer API. Summary: Right now, to sanitize a

Thanks Swarup for investigating this, it's exciting The DevTools bug you pointed to (https://

As of Firefox 148, I intend to enable the WebAssembly Branch Hinting proposal by default on all

Summary: Storage-Access-Headers allows servers to opt-in into unpartitioned cookies via HTTP headers

On Tuesday, December 9, 2025 at 12:20:44 pm UTC-5 egu...@mozilla.com wrote: https://w3c.github.io/

As of Firefox 148 I intend to disable asm.js optimizations for all platforms. asm.js [1] is the

Currently, ` movementX ` and ` movementY ` are supported only when ` mousemove ` or ` pointermove `

As of Firefox 148, I intend to enable the Joint Iteration proposal by default on all platforms. It is

The version bump to 148 has now landed on firefox-main and the soft freeze period is over. Thank you,

Hello everyone, Perftools has successfully completed the first part of the PerfCompare Statistics

Hi, In bug 1999100 I plan to (after the soft-freeze) land support for overflow-clip-margin: <

Summary: Few new CSS units for root-relative font metrics. Other browsers already implemented these

This is only the initial release (think of it as an MVP), so yeah, expect further updates to follow

the following changes have been pushed to bugzilla.mozilla.org: (tag: https://github.com/mozilla-

Hello, We have recently proposed a reduction in the scope of Firefox security advisories through the

This is an amendment to my previous email on the topic; I forgot to follow the standard template. (

Hi, In bug 2001878 I'm planning to implement view transition types. This is an extension to view

Hi, In bug 2001836 I'm intending to land a minor extension to the view tranisitions API that

On 11/21/2025 1:26 PM, Martin Thomson wrote: I don't know if this is reasonable, but I see some

We intend to land synchronous initial about:blank soon in Firefox 147. This is a web-exposed change