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Vincent Hilla
7:20 AM
Intent to prototype: Document Picture-in-Picture API
Summary: This API enables websites to open a popup-like, always-on-top window, useful for scenarios
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Intent to prototype: Document Picture-in-Picture API
Summary: This API enables websites to open a popup-like, always-on-top window, useful for scenarios
7:20 AM
Frederik Braun
Oct 28
Firefox Security & Privacy Newsletter - Q3 2025
Welcome to the Q3 2025 edition of the Firefox Security and Privacy newsletter! Security and Privacy
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Firefox Security & Privacy Newsletter - Q3 2025
Welcome to the Q3 2025 edition of the Firefox Security and Privacy newsletter! Security and Privacy
Oct 28
Daniel Holbert
,
一丝
4
Oct 27
Intent to ship: CSS '-webkit-fill-available' sizing keyword in the 'height' and 'width' properties
update: due to a few bugs, we've gone back to disabling this feature by-default on 145 (currently
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Intent to ship: CSS '-webkit-fill-available' sizing keyword in the 'height' and 'width' properties
update: due to a few bugs, we've gone back to disabling this feature by-default on 145 (currently
Oct 27
Emilio Cobos Álvarez
Oct 27
Intent to prototype and ship: display-p3-linear color space for CSS colors
Hi, In bug 1996318 I'm adding the display-p3-linear color space to CSS colors. This is a
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Intent to prototype and ship: display-p3-linear color space for CSS colors
Hi, In bug 1996318 I'm adding the display-p3-linear color space to CSS colors. This is a
Oct 27
Jonathan Kew
,
Nicolas Chevobbe
2
Oct 27
Intent to prototype & ship: CSS contrast-color() function
Thanks for sending this Jonathan. I filed a bug for DevTools support as this might break a few things
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Intent to prototype & ship: CSS contrast-color() function
Thanks for sending this Jonathan. I filed a bug for DevTools support as this might break a few things
Oct 27
Sebastian Hengst
Oct 26
Try pushes: re-push for recent submissions needed
If you pushed changes for testing to Try between Friday 10:30pm UTC / 6:30pm EDT / 3:30pm PDT and
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Try pushes: re-push for recent submissions needed
If you pushed changes for testing to Try between Friday 10:30pm UTC / 6:30pm EDT / 3:30pm PDT and
Oct 26
Florian Quèze
Oct 24
Shorter xpcshell test timeouts
tl;dr: xpcshell tests now timeout by default in 30s instead of 5 minutes and you might need to add
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Shorter xpcshell test timeouts
tl;dr: xpcshell tests now timeout by default in 30s instead of 5 minutes and you might need to add
Oct 24
Vincent Hilla
Oct 23
Intent to prototype and ship: HTMLInputElement showPicker() for textual input with datalist
Summary: showPicker enables showing pickers for types such as file or color programmatically. We
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Intent to prototype and ship: HTMLInputElement showPicker() for textual input with datalist
Summary: showPicker enables showing pickers for types such as file or color programmatically. We
Oct 23
Alex Hochheiden
Oct 17
Announcing MozillaBuild 4.2.1 Release
MozillaBuild 4.2.1 contains a major version bump for 7zip going from version 18.05 to 25.01. Links:
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Announcing MozillaBuild 4.2.1 Release
MozillaBuild 4.2.1 contains a major version bump for 7zip going from version 18.05 to 25.01. Links:
Oct 17
Ting-Yu Lin 林庭宇
,
一丝
3
Oct 17
Intent to ship: CSS text-autospace property
Thank you for all the hard work you and Firefox have put in, which has greatly benefited the vast CJK
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Intent to ship: CSS text-autospace property
Thank you for all the hard work you and Firefox have put in, which has greatly benefited the vast CJK
Oct 17
Tom Schuster
Oct 17
Intent to prototype: Sanitizer API
Summary: The Sanitizer API provides new methods for HTML manipulation. As an example, element.setHTML
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Intent to prototype: Sanitizer API
Summary: The Sanitizer API provides new methods for HTML manipulation. As an example, element.setHTML
Oct 17
Manuel Bucher
Oct 14
Intent to prototype: Storage-Access-Headers
Summary: Storage-Access-Headers is a draft to ease using unpartitioned cookies after storage-access
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Intent to prototype: Storage-Access-Headers
Summary: Storage-Access-Headers is a draft to ease using unpartitioned cookies after storage-access
Oct 14
Daniel Minor
Oct 14
Intent to ship: Iterator Sequencing
As of Firefox 146, I intend to enable the Iterator Sequencing proposal by default on all platforms.
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Intent to ship: Iterator Sequencing
As of Firefox 146, I intend to enable the Iterator Sequencing proposal by default on all platforms.
Oct 14
Eri Pazos Pérez
Oct 14
Intent to ship: Mirroring of RTL MathML operators
As of today (2025-10-14), I intend to turn support for mirroring RTL MathML stretchy operators using
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Intent to ship: Mirroring of RTL MathML operators
As of today (2025-10-14), I intend to turn support for mirroring RTL MathML stretchy operators using
Oct 14
Eri Pazos Pérez
Oct 14
Intent to ship: MathML Core math-shift: compact
As of today (2025-10-14), I intend to turn support for math-shift: compact on by default. It has been
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Intent to ship: MathML Core math-shift: compact
As of today (2025-10-14), I intend to turn support for math-shift: compact on by default. It has been
Oct 14
Pascal Chevrel
2
Oct 13
Soft code freeze for Firefox 145 starts on Thursday, October 9 @ 8am UTC (replaces previous email)
The version bump to 146 has now landed on mozilla-central and the soft freeze period is over. Thanks,
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Soft code freeze for Firefox 145 starts on Thursday, October 9 @ 8am UTC (replaces previous email)
The version bump to 146 has now landed on mozilla-central and the soft freeze period is over. Thanks,
Oct 13
Jim Blandy
Oct 7
Intent to ship: WebGPU on macOS Tahoe for ARM64
On behalf of Mozilla's WebGPU team, I intend to let WebGPU ride the trains to release in Firefox
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Intent to ship: WebGPU on macOS Tahoe for ARM64
On behalf of Mozilla's WebGPU team, I intend to let WebGPU ride the trains to release in Firefox
Oct 7
Marco Castelluccio
Oct 7
Engineering Effectiveness Newsletter (Q3 2025 Edition)
Welcome to the Q3 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
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Engineering Effectiveness Newsletter (Q3 2025 Edition)
Welcome to the Q3 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
Oct 7
Alastor Wu
Oct 7
Intent to ship: Matroska support
Starting with Firefox 145, Matroska (MKV) support will be enabled by default. Matroska playback will
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Intent to ship: Matroska support
Starting with Firefox 145, Matroska (MKV) support will be enabled by default. Matroska playback will
Oct 7
Yury Delendik
Oct 7
Intent to ship: WebAssembly Relaxed SIMD proposal
The Relaxed SIMD proposal adds a set of WebAssembly SIMD instructions that introduce local non-
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Intent to ship: WebAssembly Relaxed SIMD proposal
The Relaxed SIMD proposal adds a set of WebAssembly SIMD instructions that introduce local non-
Oct 7
Emily McDonough
Oct 7
Intent to ship: CSS property text-decoration-trim
Starting with Firefox 146, I intend to enable the CSS property text-decoration-trim by default. Bug:
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Intent to ship: CSS property text-decoration-trim
Starting with Firefox 146, I intend to enable the CSS property text-decoration-trim by default. Bug:
Oct 7
Frederik Braun
Oct 7
You can now test JavaScript debugging with Pernosco
Hi all, Our friends at pernosco have worked with us to bring JavaScript support into their tools.
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You can now test JavaScript debugging with Pernosco
Hi all, Our friends at pernosco have worked with us to bring JavaScript support into their tools.
Oct 7
Nazım Can Altınova
Oct 1
Intent to ship: PerformanceEventTiming.interactionId (for INP)
As of Firefox 144, I intend to turn PerformanceEventTiming.interactionId on by default on all
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Intent to ship: PerformanceEventTiming.interactionId (for INP)
As of Firefox 144, I intend to turn PerformanceEventTiming.interactionId on by default on all
Oct 1
Frédéric Wang
3
Sep 29
Intent to prototype: Trusted Types
Le 29/09/2025 à 11:21, Frédéric Wang a écrit : > > Standards Bodies: W3C, WhatWG, ECMA nit: I
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Intent to prototype: Trusted Types
Le 29/09/2025 à 11:21, Frédéric Wang a écrit : > > Standards Bodies: W3C, WhatWG, ECMA nit: I
Sep 29
Daniel Minor
3
Sep 17
Intent to ship: Atomics.waitAsync
This ended up shipping in Firefox 145. On Mon, Aug 18, 2025 at 10:52 AM Daniel Minor <dminor@
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Intent to ship: Atomics.waitAsync
This ended up shipping in Firefox 145. On Mon, Aug 18, 2025 at 10:52 AM Daniel Minor <dminor@
Sep 17
Donal Meehan
2
Sep 15
Soft code freeze for Firefox 144 starts on September 11 @ 8am UTC
The version bump to 145 has now landed on mozilla-central and the soft freeze period is over. Thanks,
unread,
Soft code freeze for Firefox 144 starts on September 11 @ 8am UTC
The version bump to 145 has now landed on mozilla-central and the soft freeze period is over. Thanks,
Sep 15
Kagami Rosylight
,
―
2
Sep 12
Intent to prototype: JPEG XL decoding
Would this be the new implementation tested? jxl-rs (v0.1.0) or would it be the "JPEG-XL_OXIDE
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Intent to prototype: JPEG XL decoding
Would this be the new implementation tested? jxl-rs (v0.1.0) or would it be the "JPEG-XL_OXIDE
Sep 12
Andrew Halberstadt
,
Erich Gubler
4
Sep 11
Introducing #dev-help on Matrix
More of the latter. If you know the specific team to reach out to and how to get help, I'd say
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Introducing #dev-help on Matrix
More of the latter. If you know the specific team to reach out to and how to get help, I'd say
Sep 11
Jon Coppeard
Sep 11
Intent to ship: JavaScript Symbols as WeakMap keys
As of Firefox 146 (releasing December 9) I intend to turn Symbols as WeakMap keys on by default on
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Intent to ship: JavaScript Symbols as WeakMap keys
As of Firefox 146 (releasing December 9) I intend to turn Symbols as WeakMap keys on by default on
Sep 11
Connor Sheehan
2
Sep 9
PSA: the uplift request assessment form is now in Lando
Here are some screenshots of the form in Lando and the button to edit the form after submission. The
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PSA: the uplift request assessment form is now in Lando
Here are some screenshots of the form in Lando and the button to edit the form after submission. The
Sep 9
