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Ben Visness
Aug 12
Intent to prototype and ship: WebAssembly Wide Arithmetic proposal
As of Firefox 155, we intend to enable the WebAssembly wide arithmetic proposal by default on all
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Intent to prototype and ship: WebAssembly Wide Arithmetic proposal
As of Firefox 155, we intend to enable the WebAssembly wide arithmetic proposal by default on all
Aug 12
Ben Visness
Aug 12
Intent to prototype and ship: WebAssembly Compact Import Section proposal
As of Firefox 155, we intend to enable the WebAssembly compact import section encoding by default on
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Intent to prototype and ship: WebAssembly Compact Import Section proposal
As of Firefox 155, we intend to enable the WebAssembly compact import section encoding by default on
Aug 12
Keith Cirkel
Aug 12
Intent to prototype: Sanitize While Parsing
Summary: Change the consumption steps of the Sanitizer API so that it sanitizes during parse steps,
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Intent to prototype: Sanitize While Parsing
Summary: Change the consumption steps of the Sanitizer API so that it sanitizes during parse steps,
Aug 12
Andrew Halberstadt
Aug 7
[PSA] Firefox tasks starting to clone from Github
Hey Firefox devs! Migration of Firefox's CI to Github is officially underway. If you inspect the
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[PSA] Firefox tasks starting to clone from Github
Hey Firefox devs! Migration of Firefox's CI to Github is officially underway. If you inspect the
Aug 7
Swarup Ukil
Aug 6
Intent to prototype: Display Property Animations
Summary: Per CSSWG resolution, the `display` property is now discretely animatable, in both CSS
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Intent to prototype: Display Property Animations
Summary: Per CSSWG resolution, the `display` property is now discretely animatable, in both CSS
Aug 6
Sajid Anwar
Aug 6
Intent to Ship: alpha() relative color function
As of Firefox 155, I intend to enable the CSS alpha() relative color function on all platforms. This
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Intent to Ship: alpha() relative color function
As of Firefox 155, I intend to enable the CSS alpha() relative color function on all platforms. This
Aug 6
tannal
Aug 6
Intent to prototype: MathML <a> element
Summary: Introduces the <a> element within the MathML namespace exposed via the new
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Intent to prototype: MathML <a> element
Summary: Introduces the <a> element within the MathML namespace exposed via the new
Aug 6
Sajid Anwar
Aug 5
Intent to Prototype: CSS at-rule() function for @supports
Summary: The CSS at-rule() function for the @supports at-rule allows authors to detect browser
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Intent to Prototype: CSS at-rule() function for @supports
Summary: The CSS at-rule() function for the @supports at-rule allows authors to detect browser
Aug 5
Sunil Mayya
,
Nicolas Chevobbe
2
Jul 31
Intent to ship: No-Vary-Search HTTP Caching Extension
We should add a link to the MDN page for the header in DevTools Netmonitor. Filed https://bugzilla.
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Intent to ship: No-Vary-Search HTTP Caching Extension
We should add a link to the MDN page for the header in DevTools Netmonitor. Filed https://bugzilla.
Jul 31
Alastor Wu
Jul 29
Intent to prototype: Audio Session API
Summary: The Audio Session API lets web apps declare their audio intent and observe the system audio
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Intent to prototype: Audio Session API
Summary: The Audio Session API lets web apps declare their audio intent and observe the system audio
Jul 29
Martin Tuhus
, …
Tom Schuster
3
Jul 29
Research inquiry: native Firefox support for RFC 9421 and RFC 9530
Hi Martin! We are actively looking at a related project called Web Application Integrity, Consistency
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Research inquiry: native Firefox support for RFC 9421 and RFC 9530
Hi Martin! We are actively looking at a related project called Web Application Integrity, Consistency
Jul 29
Olivier (shtrom) Mehani
Jul 27
Disabling Try support in old lando
Hi all, tl;dr: We are tentatively turning of Try support in old Lando. Please reach out to #Conduit
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Disabling Try support in old lando
Hi all, tl;dr: We are tentatively turning of Try support in old Lando. Please reach out to #Conduit
Jul 27
Sajid Anwar
Jul 25
Intent to Ship: CSS progress() function
As of Firefox 155, I intend to turn the CSS progress() function on by default on all platforms. This
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Intent to Ship: CSS progress() function
As of Firefox 155, I intend to turn the CSS progress() function on by default on all platforms. This
Jul 25
Gregory Mierzwinski
Jul 24
Frequency of Performance Regression Inactivity Needinfos Increasing to 3 Days
Hello, When a patch lands and causes a performance regression in our performance tests, authors are
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Frequency of Performance Regression Inactivity Needinfos Increasing to 3 Days
Hello, When a patch lands and causes a performance regression in our performance tests, authors are
Jul 24
Cornelius
,
Daniel Minor
2
Jul 24
Intent to ship: Promise.allKeyed (Await Dictionary)
Cornelius felt strange about thanking himself, but I'd like to point out that he is a volunteer,
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Intent to ship: Promise.allKeyed (Await Dictionary)
Cornelius felt strange about thanking himself, but I'd like to point out that he is a volunteer,
Jul 24
Diego Escalante
Jul 22
Intent to Ship: Advanced CSS attr() function.
As of Firefox 155, I intend to turn advanced attr() on by default on all platforms. It has been
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Intent to Ship: Advanced CSS attr() function.
As of Firefox 155, I intend to turn advanced attr() on by default on all platforms. It has been
Jul 22
Sajid Anwar
Jul 20
Intent to Prototype: CSS Typed Arithmetic
Summary: CSS Typed Arithmetic enhances the type checking capabilities of calc() and other math
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Intent to Prototype: CSS Typed Arithmetic
Summary: CSS Typed Arithmetic enhances the type checking capabilities of calc() and other math
Jul 20
Sajid Anwar
Jul 14
Intent to Ship: text-box-trim / text-box-edge
As of Firefox 154, I intend to turn the text-box-trim / text-box-edge (and associated text-box
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Intent to Ship: text-box-trim / text-box-edge
As of Firefox 154, I intend to turn the text-box-trim / text-box-edge (and associated text-box
Jul 14
Frederik Braun
Jul 13
Firefox Security & Privacy Newsletter 2026 Q2
Welcome to the Q2 2026 edition of the Firefox Security & Privacy Newsletter. Security and privacy
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Firefox Security & Privacy Newsletter 2026 Q2
Welcome to the Q2 2026 edition of the Firefox Security & Privacy Newsletter. Security and privacy
Jul 13
Andrew Halberstadt
Jul 9
Engineering Effectiveness Newsletter (Q2 2026 Edition)
Welcome to the Q2 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
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Engineering Effectiveness Newsletter (Q2 2026 Edition)
Welcome to the Q2 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
Jul 9
Sylvestre Ledru
Jul 9
Firefox release cadence experiment: moving to 2 weeks starting in September
Hi everyone, We are planning to move Firefox Desktop and Android from a 4-week release cadence to a 2
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Firefox release cadence experiment: moving to 2 weeks starting in September
Hi everyone, We are planning to move Firefox Desktop and Android from a 4-week release cadence to a 2
Jul 9
Tiaan Louw
Jul 9
Intent to prototype: margin-trim
Summary: margin-trim lets a container suppress the margins of its child content where those margins
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Intent to prototype: margin-trim
Summary: margin-trim lets a container suppress the margins of its child content where those margins
Jul 9
Tom Ritter
,
Kagami Rosylight
3
Jul 6
Updates to Firefox Sec Approval, Rating Process, and Keywords
Yes, I have a patch up for review in https://bugzilla.mozilla.org/show_bug.cgi?id=2048561 ; sorry for
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Updates to Firefox Sec Approval, Rating Process, and Keywords
Yes, I have a patch up for review in https://bugzilla.mozilla.org/show_bug.cgi?id=2048561 ; sorry for
Jul 6
Chris Peterson
Jul 1
Heads up: retiring the "early beta" period
In an effort to make Beta builds more representative of release candidate builds and avoid
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Heads up: retiring the "early beta" period
In an effort to make Beta builds more representative of release candidate builds and avoid
Jul 1
Emilio Cobos Álvarez
2
Jun 30
Intent to prototype: Use SkPDF as our default print-to-pdf back-end
This took a while to land (due to other priorities and blockers that came up), but it has stuck now.
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Intent to prototype: Use SkPDF as our default print-to-pdf back-end
This took a while to land (due to other priorities and blockers that came up), but it has stuck now.
Jun 30
Beth Rennie
, …
Dan Mosedale
6
Jun 25
Support for shared per-task setup and teardown in mochitest tests and xpcshell tests
Good news everyone! This should now be available in all xpcshell and mochitests. Support for
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Support for shared per-task setup and teardown in mochitest tests and xpcshell tests
Good news everyone! This should now be available in all xpcshell and mochitests. Support for
Jun 25
Sajid Anwar
Jun 24
Intent to Prototype: text-box-trim / text-box-edge
Summary: The text-box-trim and text-box-edge CSS properties (and associated text-box shorthand)
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Intent to Prototype: text-box-trim / text-box-edge
Summary: The text-box-trim and text-box-edge CSS properties (and associated text-box shorthand)
Jun 24
Sajid Anwar
Jun 23
Intent to Ship: sibling-index() and sibling-count()
As of Firefox 154, I intend to turn the sibling-index() and sibling-count() CSS functions on by
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Intent to Ship: sibling-index() and sibling-count()
As of Firefox 154, I intend to turn the sibling-index() and sibling-count() CSS functions on by
Jun 23
Gabriele Svelto
, …
Greg Stoll
7
Jun 22
Correlations in crash reports
I definitely find the DLL entries helpful in tracking down crashes caused by said DLLs :-) (in fact,
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Correlations in crash reports
I definitely find the DLL entries helpful in tracking down crashes caused by said DLLs :-) (in fact,
Jun 22
Sam Johnson
Jun 17
Intent to prototype and ship: Time picker UI
As of Firefox 154, I intend to turn on the time picker UI for <input type="time"> and
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Intent to prototype and ship: Time picker UI
As of Firefox 154, I intend to turn on the time picker UI for <input type="time"> and
Jun 17
