Necko Team – Weekly Status Meeting Notes

Date: 2026-05-26
Edition: May
Facilitator: Greg
Next on Triage: Sunil Mayya
Quality Report Coordinators (May): Randell Jesup / Sunil Mayya

Round Table

Happy Eyeballs Availability Testing

• Greg reported positive Happy Eyeballs availability test results:

  • HTTPSRR + H3 showing successful outcomes

  • H3 availability tests looking promising

• Valentin clarified interpretation of the test output columns and sequencing behavior.

• Greg plans to:

  • Reply to Martin Thompson

  • Share screenshots and results

  • Tag Max and Kershaw in follow-up discussions.

Roadmap Planning Updates

Discussion continued around roadmap priorities and H2/2027 planning:

Speculation Rules

• Team confirmed:

  • No-script prerender support planned for 2027

  • Anonymous cross-origin prefetch targeted for late H2 2026

Fetch Later API

• Proposed as:

  • P2 priority

  • H2 target if bandwidth permits

• Motivation:

  • ~5% page load usage

  • Used heavily by performance monitoring sites.

OMT / Content Process Prototype

• Continued discussion on:

  • Moving networking further off the main thread

  • Content-process networking experiments.

• Current plan:

  • Prototype both:

    • Background fetch channel work

    • Content-process networking

  • Run in parallel.

• Randell:

  • Working classifier cache implementation already reduces synchronization overhead.

Capturing Startup Profiles & Logs

• Valentin published updated guidance for:

  • Capturing startup logs/profiles

  • Investigating Happy Eyeballs startup bugs.

  • https://bugzilla.mozilla.org/show_bug.cgi?id=2042382 

• Team asked to review and use the new workflow.

Fx152 Release Coordination

• Compression dictionary rollout review:

  • Randell verifying whether all Fx152 patches landed.

• Release work:

  • Release notes

  • SUMO updates

  • Android rollout validation.

Team Check-ins (Highlights)

Valentin

• Working on:

  • Priority queue

  • Fetch upload streaming

  • DoH/privacy work

  • Glean probe migration

• Most Glean migration now complete.

• Fetch upload streaming patches awaiting review from Kershaw.

Sunil

• Speculation Rules implementation progressing.

• LNA updates:

  • Worker support landed

  • Android rollout coordination ongoing

  • WebSocket restrictions planned for Fx153

• Working with Emma on:

  • Temporary permissions in PBM.

• QA testing expected to start next week.

Randell

• WebTransport cleanup continuing.

• Working on:

  • Classifier cache implementation

  • Compression dictionary patch validation

  • Release verification for Fx152.

Oskar

• SEARCH/HyStart++ experimentation progressing:

  • Beta/nightly experiments enrolling users

  • Spurious congestion recovery experiments active

• neqo now using nss-rs in Firefox.

Important Business

Priority Queue

Active Projects

FEISTY

• Riding trains in Fx153

• Alerting probes still needed

• Dashboard work continuing:

  • Retry/fallback monitoring

  • Essential domain categorization updates.

DoH Enablement

• Fenix/Focus rollout ongoing.

• Preliminary nightly experiment results:

  • Similar to previous experiments.

• Potential next steps:

  • RetryTRR confirmation state

  • Connection-state checks before TRR use.

Compression Dictionary Transport

• Continuing stabilization for Fx153.

• Release verification in progress.

Local Network Access (LNA)

• Worker support landed.

• Rollout currently:

  • 5% desktop rollout

  • Android beta work ongoing.

• Current focus:

  • PBM permission behavior

  • Android uplift bugs

  • WebSocket restrictions.

QUIC / SEARCH / HyStart++

• SEARCH implementation feature complete for now.

• Experiments active through June 1:

  • SEARCH/HyStart++ beta

  • Alternate congestion control baselines.

• Metrics and prefs riding Fx152 trains.

Happy Eyeballs

• Availability testing progressing well.

• Continued H3 validation and startup investigation work.

Speculation Rules API

• Fx155 target.

• No-vary-search nearing landing.

• IPC design and prefetch work continuing.

Performance & Quality

Current areas of focus:

• Socket-thread bottleneck reduction

• OMT experimentation

• H2/H3 benchmarking

• Cloudflare benchmark integration

• Fetch upload streaming

• Android rollout validation.

WebCompat

Needs investigation:

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

• https://bugzilla.mozilla.org/show_bug.cgi?id=2022833

• https://bugzilla.mozilla.org/show_bug.cgi?id=2012345

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

• https://bugzilla.mozilla.org/show_bug.cgi?id=1987944

Guidance:

• Investigate and file proper component bugs

• Avoid direct reassignment

• Continue engaging reporters for logs/HAR files.

Decisions & Alignment

• Continue:

  • Happy Eyeballs H3 validation

  • OMT experimentation

  • Fx152 stabilization

• Proceed with:

  • Fetch Later planning

  • Speculation Rules H2 roadmap work.

Action Items

Greg

• Reply to Martin Thompson with Happy Eyeballs results

• Share screenshots/results

• Ping Marco regarding ME tracking report

Randell

• Verify Fx152 compression dictionary landings

• Submit classifier cache patches for review

Sunil

• Update speculation rules project schedule

• Coordinate Android LNA rollout fixes

• Work with Emma on PBM temporary permissions

• Plan WebSocket restrictions for Fx153

Valentin

• Validate HTTPS/H3 local build behavior

• Continue fetch upload streaming work

• Continue Glean migration and DoH work

Team

• Review startup log/profile capture guidance

• Investigate outstanding WebCompat bugs

• Continue priority queue reduction efforts