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Chris H-C
Jun 16
Phabricator Data Reviews: remember to add the bug number
Hello! All new or expanded data collection in Mozilla projects are subject to Data Collection Review[
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Phabricator Data Reviews: remember to add the bug number
Hello! All new or expanded data collection in Mozilla projects are subject to Data Collection Review[
Jun 16
Katherine Patenio
Jun 15
Giving You More Control - These Weeks in Firefox: Issue 204
Hey Firefox fans, On May 26, 2026, the Firefox Desktop team met to discuss what's new in the
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Giving You More Control - These Weeks in Firefox: Issue 204
Hey Firefox fans, On May 26, 2026, the Firefox Desktop team met to discuss what's new in the
Jun 15
Manuel Bucher
Jun 11
Intent-To-Unship: cookieBehavior LIMIT_FOREIGN (3) and REJECT_TRACKER (4)
We intend to remove support for two legacy cookie behaviors in Firefox: cookieBehavior=3 (
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Intent-To-Unship: cookieBehavior LIMIT_FOREIGN (3) and REJECT_TRACKER (4)
We intend to remove support for two legacy cookie behaviors in Firefox: cookieBehavior=3 (
Jun 11
Katherine Patenio
Jun 8
Firefox desktop development meeting - 2026-06-09
Hello Firefox fans! Here are the details for tomorrow's meeting: When: http://arewemeetingyet.com
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Firefox desktop development meeting - 2026-06-09
Hello Firefox fans! Here are the details for tomorrow's meeting: When: http://arewemeetingyet.com
Jun 8
Katherine Patenio
Jun 3
More Kit, More Control – These Weeks in Firefox: Issue 203
Hey firefox-dev, Following Mike Conley's previous "These Weeks in Firefox" email (check
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More Kit, More Control – These Weeks in Firefox: Issue 203
Hey firefox-dev, Following Mike Conley's previous "These Weeks in Firefox" email (check
Jun 3
Mike Conley
Jun 1
Backup for a Rainy Day - These Weeks in Firefox: Issue 202
Hello firefoxd-dev, A few weeks back (April! Whoops, sorry for the delay!), the Firefox Desktop team
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Backup for a Rainy Day - These Weeks in Firefox: Issue 202
Hello firefoxd-dev, A few weeks back (April! Whoops, sorry for the delay!), the Firefox Desktop team
Jun 1
Olivier (shtrom) Mehani
2
May 28
`mach try` now uses the new lando instance
Hi all, More updates on try and new lando. On Thu, 16 Apr 2026 at 16:35, Olivier (shtrom) Mehani <
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`mach try` now uses the new lando instance
Hi all, More updates on try and new lando. On Thu, 16 Apr 2026 at 16:35, Olivier (shtrom) Mehani <
May 28
Mike Conley
May 26
Firefox desktop development meeting - 2026-05-26
Hello Firefox fans! Here are the details for today's meeting (in 30 minutes! Sorry for the late
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Firefox desktop development meeting - 2026-05-26
Hello Firefox fans! Here are the details for today's meeting (in 30 minutes! Sorry for the late
May 26
Bas Schouten
,
Alessio Placitelli
2
May 21
Removed Legacy Mirrors
Great job, Bas! On Wed, 20 May 2026 at 22:39, 'Bas Schouten' via firef...@mozilla.org <
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Removed Legacy Mirrors
Great job, Bas! On Wed, 20 May 2026 at 22:39, 'Bas Schouten' via firef...@mozilla.org <
May 21
Mark Striemer
May 12
Firefox desktop development meeting - 2026-05-12
Hello Firefox fans! Here are the details for todays's meeting: When: http://arewemeetingyet.com/
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Firefox desktop development meeting - 2026-05-12
Hello Firefox fans! Here are the details for todays's meeting: When: http://arewemeetingyet.com/
May 12
Donal Meehan
May 6
Weekly Firefox dot release schedule starting with Firefox 151
Hi everyone, We're planning a release process change to improve how quickly and predictably we
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Weekly Firefox dot release schedule starting with Firefox 151
Hi everyone, We're planning a release process change to improve how quickly and predictably we
May 6
Olivier (shtrom) Mehani
May 6
Lando can now show you your own queue of jobs
Hi all, A little heads up that we landed and deployed https://bugzilla.mozilla.org/show_bug.cgi?id=
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Lando can now show you your own queue of jobs
Hi all, A little heads up that we landed and deployed https://bugzilla.mozilla.org/show_bug.cgi?id=
May 6
Marcin Kozinski
Apr 30
Introducing kotlin-test to our codebase
Hi all, Today we landed our first ADR (Architectural Decision Record). It's about introducing a
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Introducing kotlin-test to our codebase
Hi all, Today we landed our first ADR (Architectural Decision Record). It's about introducing a
Apr 30
Katherine Patenio
Apr 30
Import-ant Updates - These Weeks in Firefox: Issue 201
Hello firefox-dev, We have another round of Firefox Desktop engineering updates to send out this week
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Import-ant Updates - These Weeks in Firefox: Issue 201
Hello firefox-dev, We have another round of Firefox Desktop engineering updates to send out this week
Apr 30
Mike Conley
Apr 28
Firefox desktop development meeting - 2026-04-28
Hello Firefox fans! Here are the details for today's meeting: When: http://arewemeetingyet.com/
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Firefox desktop development meeting - 2026-04-28
Hello Firefox fans! Here are the details for today's meeting: When: http://arewemeetingyet.com/
Apr 28
Niklas Baumgardner
Apr 27
VPN, Split View, and Other Goodies - These Weeks in Firefox: Issue 200!
Hello firefox-dev, The Firefox Desktop engineering team gathered a the other week to share the latest
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VPN, Split View, and Other Goodies - These Weeks in Firefox: Issue 200!
Hello firefox-dev, The Firefox Desktop engineering team gathered a the other week to share the latest
Apr 27
Florian Quèze
Apr 24
mochitest failures in CI are now retried within the same job
A recent patch (bug 2032038) changed how mochitest failures are handled in CI: - Failed mochitests
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mochitest failures in CI are now retried within the same job
A recent patch (bug 2032038) changed how mochitest failures are handled in CI: - Failed mochitests
Apr 24
Gregory Mierzwinski
Apr 22
Telemetry Alerting Beta Now Open
Hello, We're excited to announce that the telemetry alerting beta is now open to everyone! Simply
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Telemetry Alerting Beta Now Open
Hello, We're excited to announce that the telemetry alerting beta is now open to everyone! Simply
Apr 22
Emilio Cobos Álvarez
, …
Dave Townsend
9
Apr 21
PSA: Node ownerGlobal changes
Sounds good. I don't want to bikeshed too much but I'm not sure `relevantGlobal` really
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PSA: Node ownerGlobal changes
Sounds good. I don't want to bikeshed too much but I'm not sure `relevantGlobal` really
Apr 21
Frederik Braun
Apr 17
Firefox Security & Privacy Newsletter Q1 2026
Welcome to the Q1 2026 edition of the Firefox Security & Privacy Newsletter. Security and privacy
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Firefox Security & Privacy Newsletter Q1 2026
Welcome to the Q1 2026 edition of the Firefox Security & Privacy Newsletter. Security and privacy
Apr 17
Mike Conley
Apr 15
QR Codes, Speed Calculators, Better RAM Usage - These Weeks in Firefox: Issue 199
Hello firefox-dev, A few weeks ago, the Firefox Desktop team got together and compared notes on the
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QR Codes, Speed Calculators, Better RAM Usage - These Weeks in Firefox: Issue 199
Hello firefox-dev, A few weeks ago, the Firefox Desktop team got together and compared notes on the
Apr 15
Andrew Halberstadt
2
Apr 12
[NOTICE] FirefoxCI Scheduled Downtime with Trees Closed (Sun April 12th)
The scheduled migration is complete. Please reach out in #Firefox-CI on Matrix if you're seeing
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[NOTICE] FirefoxCI Scheduled Downtime with Trees Closed (Sun April 12th)
The scheduled migration is complete. Please reach out in #Firefox-CI on Matrix if you're seeing
Apr 12
David Lawrence
Apr 7
Engineering Effectiveness Newsletter (Q1 2026 Edition)
Welcome to the Q1 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
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Engineering Effectiveness Newsletter (Q1 2026 Edition)
Welcome to the Q1 edition of the Engineering Effectiveness Newsletter! The Engineering Effectiveness
Apr 7
Suhaib Mujahid
Apr 7
New Feature: Request AI Code Review Directly from moz-phab
Hello, We've added AI-powered code review support to moz-phab! You can now request an AI review
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New Feature: Request AI Code Review Directly from moz-phab
Hello, We've added AI-powered code review support to moz-phab! You can now request an AI review
Apr 7
Suhaib Mujahid
Apr 1
New Feature: --auto Flag Now Available for mach test
Hello, We recently landed a new feature in mach test: the --auto flag. This allows ./mach test to use
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New Feature: --auto Flag Now Available for mach test
Hello, We recently landed a new feature in mach test: the --auto flag. This allows ./mach test to use
Apr 1
Jonathan Almeida
Mar 20
New and existing changes to try presets for Android
Hi all, With bug 2012189 landing, there is a new preset named `android-fullstack` that combines and
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New and existing changes to try presets for Android
Hi all, With bug 2012189 landing, there is a new preset named `android-fullstack` that combines and
Mar 20
Katherine Patenio
Mar 20
Extension Theming Improvements and More - These Weeks in Firefox: Issue 198
Hello firefox-dev, We're back to share more Firefox Desktop updates, this time from our
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Extension Theming Improvements and More - These Weeks in Firefox: Issue 198
Hello firefox-dev, We're back to share more Firefox Desktop updates, this time from our
Mar 20
Katherine Patenio
Mar 17
Firefox Profiler Dark Mode and Updated Smart Window Prompts - These Weeks in Firefox: Issue 197
Hi firefox-dev, Continuing from Mike Conley's previous "These Weeks in Firefox" email
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Firefox Profiler Dark Mode and Updated Smart Window Prompts - These Weeks in Firefox: Issue 197
Hi firefox-dev, Continuing from Mike Conley's previous "These Weeks in Firefox" email
Mar 17
Kala Severe
Mar 17
PerfCompare: Default statistical method is now Mann-Whitney-U
Hello everyone, PerfCompare has switched the default statistical method from Student-T to Mann-
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PerfCompare: Default statistical method is now Mann-Whitney-U
Hello everyone, PerfCompare has switched the default statistical method from Student-T to Mann-
Mar 17
Henri Sivonen
Mar 16
New C++ and Rust functions for comparing user-visible strings for sorting in the UI
Hello firefox-dev, There are now new functions in C++ and Rust for comparing user-visible strings
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New C++ and Rust functions for comparing user-visible strings for sorting in the UI
Hello firefox-dev, There are now new functions in C++ and Rust for comparing user-visible strings
Mar 16
