Firefox/Channels/Meetings/2026-05-21

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Channel Meeting Details

• Thursdays at 7:30am Pacific Time
• Past meeting notes: https://wiki.mozilla.org/Firefox/Channels/Meetings

Video/Teleconference Details

• Zoom Meeting ID: 536 097 768
• https://mozilla.zoom.us/j/536097768

REMEMBER

These notes are read by people who weren't able to attend the meeting. Please make sure to include links and context so they can be understood.

Attendees

RyanVM, pascalc, dmeehan, ljanos, Mira, oardelean, jgibbs, rpopovici, atrif, phorea, dbarladeanu, epopescu,bmaris, dsmith, tzsoldos, Aryx, btot, dveditz

Schedule Update

• 151
  • Desktop 151.0 remained throttled @ 0% rollout
    • Unplanned Desktop 151.0.1 live @ 25% general rollout and 100% for users on 151.0
    • This was shipped to address a top crash and an incident fix
    • Bumping to 100% later today/tomorrow pending stability
  • Android Fenix/Focus 151.0 live @ 100% rollout
  • Desktop and Android planned dot release scheduled for next week
    • gtb on 2026-05-25, go-live on 2026-05-26 after QA sign-off
  • Firefox iOS 151.1 scheduled to start phased rollout at 03:00 UTC on 2026-05-24
  • Firefox iOS 151.2 branches and Firefox iOS 151.2 gtb tomorrow
• 152
  • Desktop & Focus Android 152.0b1 live @ 50%
    • Fenix 152.0b1 rollout halted due to #incident-clear-cache-prompt, fix should be in b2
  • Desktop 152.0b2 gtb tomorrow @ 100% rollout
    • Settings Redesign expected to be in it
  • Android 152.0b2 gtb tomorrow @ 99% rollout
    • Bumping to 100% pending QA sign-off
• 153
  • New cycle has started for Fx153
  • Settings redesign landed but the plan is to uplift to 1552

Release Quality Metrics

• https://bugdash.moz.tools/#tab.beta
  • Metrics in line for the start of a new cycle.
  • As noted above, Fenix 152.0b1 rollout was halted due to the crash reporter incident

Desktop Stability

Nightly

crash incidence (% of users experiencing a crash): 3.09% (+0.11pp compared to previous week)

• Crash in [@ mozilla::net::nsHttpConnectionMgr::CheckTransInPendingQueue]
  • https://bugzilla.mozilla.org/show_bug.cgi?id=2041239
  • moderate frequency
  • has patch

Beta

crash incidence: 2.15% (-0.03pp)

Release

crash incidence: 1.04% (-0.05pp)

• Crash in [@ js::BarrieredBase<T>::unbarrieredSet]
  • https://bugzilla.mozilla.org/show_bug.cgi?id=2041307
  • low frequency
  • judged as likely bad hardware

Mobile Stability

• Nightly Crash in [@ java.lang.IllegalArgumentException: at org.mozilla.geckoview.GeckoRuntime.init(GeckoRuntime.java)]
  • https://bugzilla.mozilla.org/show_bug.cgi?id=2039491
  • top crasher for Nightly
  • no activity since filed a week

QA

• Release 151 World Cup web compatibility testing in progress.

Beta

• Beta new feature preliminary testing is in progress. Reports will be sent until next week, May 26.
• Beta smoke testing in progress. No concerns.
• 1st round of Functional testing is in progress. No concerns.
• Beta top site web compatibility testing completed. No concerns.

Mobile

• Android [ljanos]
  • Build Signoffs Fenix & Focus
    • Beta 152.0b1 build 1 - status GREEN
    • Beta 152.0b1 build 2 - status GREEN
  • Feature Testing
    • [QA-5139] Android World cup feature PHASE 2 - Nightly 153 - Testing in progress
    • [QA-5228] Importing bookmarks (Android) - Nightly 152 - status Red
    • [QA-5293] Android - Testing Different Marketing Cards Variants - Treatment D Beta 152 testing - in progress
    • [QA-5133] Search Optimization - Sports - Nightly 152 sign-off status GREEN
    • [QA-5021] Android Tab Groups - Beta 152 testing - sign-off GREEN
• iOS [Diana]
  • Build Signoffs
    • Firefox iOS v151.1 (71986) - Release Candidate 1 - status [YELLOW]
  • Feature Testing
    • [QA-5138] - iOS - World Cup Feature Milestone 2 - nightly testing in progress

Roundtable & Special Topics

• US Holiday on Monday, May 25
• Romanian Holiday on Monday, June 1