dev-platform@mozilla.org

A recent patch (bug 2032038) changed how mochitest failures are handled in CI: - Failed mochitests

Hello, We're excited to announce that the telemetry alerting beta is now open to everyone! Simply

Sounds good. I don't want to bikeshed too much but I'm not sure `relevantGlobal` really

Intent to prototype & ship: Fullscreen Keyboard Lock API Summary: The Fullscreen Keyboard Lock

Welcome to the Q1 2026 edition of the Firefox Security & Privacy Newsletter. Security and privacy

As of Firefox 151, I intend to turn the Web Serial API on by default on Windows, Mac, and Linux. It

Hi all, tl;dr: No action needed, this should be transparent. Do report any issue, and bypass with `

Summary: Add a new 'text' value for JavaScript's import type attribute, with which a file

As of Firefox 151, I intend to enable the Document Picture-in-Picture API by default. It was

As of Firefox 151, I intend to turn CSS Container Style Queries on by default for all platforms. It

The scheduled migration is complete. Please reach out in #Firefox-CI on Matrix if you're seeing

Summary: Support for the `shadowrootslotassignment` attribute, mapping to `slotAssignment` on `

Summary: `position-anchor: normal` allows authors to use anchor positioning without having to specify

Welcome to the Q1 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness

Hello, We recently landed a new feature in mach test: the --auto flag. This allows ./mach test to use

On 3/25/26 6:25 pm, 'Hiroyuki Ikezoe' via dev-pl...@mozilla.org wrote: I intend to ship

Hi, In bug 2022827 and related, we're adding support for multiple container conditions within a

As of Firefox 151, I intend to implement and ship the 'lang' attribute for Canvas2D text.

Hi Frederik and all, Le vendredi 13 mars 2026, 10:59:57 heure normale d'Europe centrale Frederik

I'm trying to find the intent-to-prototype thread associated with this change but my Google-fu is

On Friday, March 13, 2026 at 12:16:00 am UTC-4 ome...@mozilla.com wrote: This led to confusing

Hello everyone, PerfCompare has switched the default statistical method from Student-T to Mann-

Hi, In bug 2023569 I plan to enable by default `light-dark()` for CSS image values. This was

We currently have two different methods for running tasks in content processes from tests.

The exact mechanics didn't end up matching the path that was contemplated, but it terms of what

Summary: Add a CSS-wide keyword that allows reversing a single rule from the cascade, rather than a

[cross-posting to stability] Hello all, I'm glad to inform you that symbol information for macOS

Hi all, In bug 2020017, I plan to start testing the SkPDF back-end on Nightly builds for print-to-pdf

As of Firefox 150, I intend to remove adjustment of default MathML operator lspace/rspace when math-

As of Firefox 150, I intend to turn ariaNotify on by default on all platforms. It has been developed