Necko Team – Weekly Status Meeting Notes

Date: 2026-03-24
Edition: March
Facilitator: Greg
Next on Triage: Kershaw Jang
Quality Report Coordinators (March): Valentin Gosu / Sunil Mayya

Round Table

Team Updates & Triage Rotation

• Triage rotation updated:

  • Kershaw covering triage this week.

  • Valentin and Kershaw helping backfill responsibilities during coverage gaps.

• Valentin to coordinate OMT investigations and cookie peer responsibilities.

Retro Scheduling

• Agreement to postpone the retro 

• Team to ensure retro actions are reviewed and updated asynchronously.

Captive Portal / DoH Issues

• Reports of:

  • DoH failures in captive portal scenarios (Mode 3).

  • Connectivity breaking until re-authentication.

• Issues identified:

  • Frequent connectivity checks interrupting sessions.

  • Poor user messaging and recovery experience.

• Actions:

  • Collect additional logs and profiles.

  • Valentin and Randell to review profiler data shared by Lars.

Travel & SecPrivNecko Meetup

• Reminder to book travel (Navan) for Toronto meetup.

• Some hotel policy issues raised; exceptions may be needed.

• Greg coordinating logistics and follow-ups.

Team Check-ins (Highlights)

• Oskar

  • Released Neqo v0.24.0 / v0.24.1 (HyStart++ pref’d off).

  • Added new congestion control / slow start metrics.

  • Nightly experiment for HyStart++ enrolling users.

• Max

  • Presented at IETF on Happy Eyeballs.

  • Continued work on Rust implementation and profiler markers.

• Randell

  • WebTransport Ongoing review load (~60 patches).

  • Will update PTO calendar.

• Valentin

  • Fixed WebCompat issue (content-type sniffing).

  • Landed and uplifted LNA patches.

  • Working on:

    • Cookie-related coordination

    • LNA prompt improvements

• Kershaw

  • Progress on expedition tests.

  • Continued work on Happy Eyeballs.

  • Investigating intermittent failures before enabling features in Nightly.

Important Business

Priority Queue

(Non-security bugs only; security-sensitive items excluded)

Closed Fixed (Last Week – Non-Security)

• 2020156 – MOZ_CRASH assertion

Active Projects

FEISTY

• Downloads GCP migration complete; final confirmation pending.

• Downloads now unblocked.

DoH Enablement (Fenix & Focus)

• Continued work on:

  • Reducing DNS warmup overhead

  • Improving applink performance under DoH

• Performance issues still observed in early data; expected improvements from Happy Eyeballs.

Local Network Access (LNA)

• Desktop rollout complete for 150; Android following 151.

• Key updates:

  • Blocking LNA requests from insecure contexts.

  • Avoiding prompts on certificate mismatch.

  • TCP connection adjustments to prevent SNI leaks.

QUIC / HyStart++

• HyStart++ landed with metrics and framework support.

• Nightly experiment running.

• Next steps:

  • Expand metrics

  • Begin A/B comparison vs classic slow start

Happy Eyeballs

• Ongoing Rust/C++ integration work.

• IPv4/IPv6 preference and FFI review in progress.

Performance & Quality

• Continued improvements in:

  • Applink performance

  • QUIC slow start metrics

• Tracker tailing experiments ongoing; longer delay variants under test.

• Focus remains on:

  • Socket thread efficiency

  • DNS / DoH latency improvements

Maintenance Effectiveness

• Last week: 105% ✅

• Month: 91%

• Trend stable despite increased inflow.

WebCompat

Key bugs needing attention:

• 2022833

• 2024332

• 2012345

Guidance:

• Continue diagnosing root causes.

• File new component bugs instead of moving existing ones.

• Ensure PII is removed from logs.

Decisions & Alignment

• Postpone retro to maintain focus on critical fixes.

• Continue staged rollout and monitoring for LNA and DoH improvements.

Action Items

• Kershaw

  • Backfill triage this week.

  • Continue Happy Eyeballs

• Valentin

  • Coordinate cookie peer responsibilities.

  • Continue LNA improvements

  • Review captive portal profiler data.

• Randell

  • Investigate WebCompat issues as capacity allows.

  • Update team calendar with PTO.

• Greg

  • Facilitate SecPrivNecko monthly update.

  • Investigate ME metric discrepancies.