dev-platform@mozilla.org

On the topic of compile time speedups, a long time ago we got a nice boost in 1443252 [0] by marking

As of Firefox 143, I intend to enable Atomics.waitAsync by default on all platforms. It is currently

As of yesterday (July 21 2025), I've removed support for the "overflow: -moz-hidden-

Summary: Up until now, Firefox used an internal language, x-math , to select from a list of

The version bump to 143 has now landed on firefox-main (mozilla-central) and the soft freeze period

Welcome to the latest edition of the Performance Tools Newsletter! The PerfTools team empowers

Welcome to the Q2 2025 edition of the Firefox Security and Privacy newsletter! Security and Privacy

The patches from https://bugzilla.mozilla.org/show_bug.cgi?id=1975980 to reset modified preferences

Hi, I intend to ship Animation.overallProgress as of Firefox 142. Pref: N/A Bug: https://bugzilla.

Summary: The new Integrity-Policy header is part of Subresource Integrity and a first milestone

Yep, big lift and great job. Wonderful work Florian, and everybody who helped drive this through! On

Welcome to the Q2 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness

We intend to turn “Render unknown MathML elements as an mrow” on by default. A combined intent to

Summary: Adds the `headingoffset` and `headingreset` global attributes, which provide a way to create

Summary: Adds the :heading and :heading(AnB#) selectors Bug: https://bugzilla.mozilla.org/show_bug.

Hi all, As of Firefox 142, I intend to turn the Prioritized Scheduling API on by default on all

Hi, I intend to turn endpoint-inclusive commitStyles on by default as of Firefox 142. (ie `Animation.

The version bump to 142 has now landed on firefox-main (mozilla-central) and the soft freeze period

Summary: Limit cross-origin iframes from navigating the top-level browsing context unless specific

The deprecated read-only GitHub mirror of Firefox's source - https://github.com/mozilla/gecko-dev

Sounds great. I hope this also is plus for CC TB mochitests as well. :-) I run them locally and on

Hello, I intend to enable URLPattern for all channels as of Firefox 142 (and I may be able to get

Congrats for getting us to this stage: I'm very excited to see this ship on Windows as well! On

As of Firefox 141, I intend to turn the CSS property `font-variant-emoji` on by default for all

Hello, Gecko can use webkitdirectory attribute and webkitEntries API to choose file directory on the

Summary: We've not dispatched mouse/pointer boundary events at the last mouse cursor position

MozillaBuild 4.2 bundles new tools, updates existing ones, and includes quality-of-life improvements.

Hello, In bug 1914388, I plan to remove the usage of logging.config.modules, which was originally

There's also `./mach try chooser` which was aimed to replace the old "try syntax chooser

Summary: We aim to improve Firefox's defenses against attacks that exploit the browser's