Necko Team – Weekly Status Meeting Notes

Date: 2026-06-02
Edition: June
Facilitator: Greg
Next on Triage: Valentin Gosu
Quality Report Coordinators (June): Valentin Gosu / Sunil Mayya

Round Table

Triage Calendar Sync Issue

• Greg reported that the Necko triage calendar and Bugzilla assignments are currently out of sync.

• Valentin suspects a BugBot issue and suggested contacting Sylvestre Ledru to investigate.

• Team agreed to continue using the calendar as the source of truth for current triage assignments.

Contractor Opportunity

• Greg discussed a potential contractor engagement through November (~5 months).

• Possible project focus areas include web platform work and MASQUE performance optimization.

Test Monitoring Improvements

• Valentin highlighted the Firefox test dashboard:

  • https://tests.firefox.dev/issues.html

• Dashboard provides better visibility into disabled and failing tests than Bugzilla.

• Team encouraged to use it more proactively for maintenance work.

Authentication Retry Preference

• Discussion around:

  • network.auth.use_redirect_for_retries

• Previously limited due to NTLM concerns.

• Valentin proposed broader enablement to gain additional field validation and uncover remaining issues.

Spurious Recovery Performance Results

• Oskar presented experiment results showing major throughput improvements:

  • Roughly 15–25% throughput gains for impacted users.

  • Most visible in larger upload/download workloads.

• Performance wins dashboard prepared.

• Team plans:

  • Share results publicly.

  • Present findings during SecPrivNecko next week.

HTTP/3 and HTTPS RR Progress

• Max reported:

  • Debugging HTTPS RR failures preventing HTTP/3 upgrades.

  • Significant Android improvements:

    • DoH users now achieving roughly double previous HTTP/3 utilization rates.

• Additional DNS timing investigations ongoing.

WebTransport Planning

• Team discussed landing strategy for WebTransport work.

• Consensus:

  • Smaller independent patches.

  • Bottom-up landing order.

• Randell will prepare a feature inventory covering:

  • Interop status.

  • MOQ requirements.

  • Remaining gaps.

Team Check-ins

Sunil

• No-vary-search landed and riding Fx153 trains.

• LNA worker support landed.

• Continuing work on:

  • Prompt frequency reductions.

  • Android rollout.

  • Beta testing preparation.

Valentin

• Taking triage duties this week.

• Working on:

  • Test infrastructure improvements.

  • Priority queue items.

  • Proxy fallback behavior investigations.

Kershaw

• Re-enabling disabled ABI board tests.

• Investigating:

  • ECH issues.

  • HTTPS DNS timing behavior.

  • Happy Eyeballs follow-up bugs.

Randell

• Investigating top intermittent failures using Claude sandbox analysis.

• Reviewing WebTransport interop testing opportunities.

• Following up on content-type handling compatibility issues.

Oskar

• Presented:

  • SEARCH / HyStart++ experiment analysis.

  • Spurious Recovery results.

• Planning:

  • Beta experiments.

  • Additional telemetry for slow-start exit investigation.

  • Performance report publication.

Lars

• Reviewing NSSRS integration fallout.

• Addressing dependency versioning and crate management concerns.

Important Business

Priority Queue

Active Projects

FEISTY

• Riding trains in Fx153.

• Alerting probes still required.

• Essential-domain categorization updates completed.

• Dashboard improvements continuing.

DoH Enablement

• No major updates this week.

• Focus remains on:

  • Fenix rollout.

  • RetryTRR confirmation state.

  • Connection-state validation before TRR usage.

Compression Dictionary Transport

• Continuing stabilization work for Fx153.

• Release verification ongoing.

WebTransport / Interop 2026

• Active implementation work.

• Team aligning on landing strategy and interoperability goals.

• Interop testing investigation underway.

Local Network Access

• Worker support landed.

• Rollout underway.

• Android beta preparations continuing.

• PBM permission behavior under review.

QUIC / SEARCH / HyStart++

• Nightly experiment complete.

• Results:

  • No breakage detected.

  • SEARCH outperforming HyStart++ in throughput metrics.

• Next:

  • Beta validation experiment.

  • Additional telemetry collection.

Happy Eyeballs

• Enabled in Nightly.

• Several follow-up fixes in progress:

  • ECH retry support.

  • Timing metrics improvements.

  • Client certificate handling.

Speculation Rules API

• No-vary-search landed and riding Fx153.

• Prefetch work and IPC design continue.

Performance & Quality

Major focus areas:

• Spurious Recovery throughput improvements

• SEARCH validation

• HTTP/3 adoption improvements

• Slow-start behavior analysis

• Fenix networking performance

• Test failure reduction and automation

WebCompat

Needs investigation:

• https://bugzilla.mozilla.org/show_bug.cgi?id=2042802

• https://bugzilla.mozilla.org/show_bug.cgi?id=2040124

• https://bugzilla.mozilla.org/show_bug.cgi?id=1975238

Guidance remains:

• Investigate root cause.

• File component-specific bugs when appropriate.

• Continue reporter engagement and log collection.

Decisions & Alignment

• Continue rollout and validation of Happy Eyeballs.

• Continue SEARCH experimentation and telemetry collection.

• Proceed with WebTransport incremental landing strategy.

• Continue monitoring HTTP/3 adoption metrics.

• Maintain focus on Fx152 release readiness and Fx153 stabilization.

Action Items

Greg

• Contact Sylvestre regarding BugBot triage synchronization issue.

• Clarify contractor hiring requirements.

• Coordinate SecPrivNecko monthly updates.

• Continue ME report tracking and queue monitoring.

Randell

• Investigate intermittent failures via Claude analysis.

• Produce WebTransport feature inventory.

• Evaluate interop test integration options.

Kershaw

• Complete ABI test re-enablement.

• Continue HTTPS RR / ECH investigations.

• Validate DNS timing hypothesis.

Oskar

• Publish performance win summary.

• Launch SEARCH beta experiment.

• Add telemetry for slow-start analysis.

Valentin

• Perform triage duties.

• Continue priority queue work.

• Follow up on proxy fallback investigations.

Team

• Submit H1 performance self reviews.

• Attend retrospective on June 4.

• Review and investigate WebCompat bugs.

• Continue priority queue reduction efforts.