Meeting 2024-07-16

• Team calendar

  • Next on Necko triage: Sunil

• New contributors / Friends of Necko THANK YOU!!

  • Andrea Marchesini [:baku]

    • Bug: 1903400 Reject cookies containing %xa and %xd for cookie WPTs 

    • Bug: 1903408 No cookie sent for redirected path mismatch WPT failure 

    • Bug: 1906914 Fix the max-age attribute parsing 

  • Henri Sivonen (:hsivonen)

    • Bug: 1889536 Migrate IDNA handling to ICU4X 

  • Tooru Fujisawa [:arai]

    •  Bug: 1906393 Add nsIIncrementalStreamLoader.onStartRequest 

  • Max Inden

    • Bug: 1907287 typo http3 `max_data` `max_stream_data` pref doc 

• Round Table

  • No public topics this week

• Active Projects roadmap 

  • Native HTTPS RR Implementation (riding the trains, target Fx129)

  • 3rd Party Cookie Deprecation (in progress, target Fx133)

    • No data being generated from CHIPS partition limit telemetry, investigating

  • Fetch keepalive: (in progress, Target Fx130) 

    • [Sunil] Milestone 2 Work Ongoing. 

      • Testing the implementation

      • Will post for review once tests are complete

  • HTTP Priorities Experiments (in progress, target Fx130 )

    • Experiment live

      • Priority header already shipped in Fx126

        • https://bugzilla.mozilla.org/show_bug.cgi?id=1865394

      • Fx 128 includes:

        • Implement Extensible Prioritization Scheme for HTTP/2

          • https://bugzilla.mozilla.org/show_bug.cgi?id=1865040

        • Incremental flag on images, dom

          • https://bugzilla.mozilla.org/show_bug.cgi?id=1784496

        • [acreskey] Did not see clear, reproducible signal of impact, Fenix 4G browsertime test (realism over noise)

  • Firefox/Chrome benchmark test suite (in progress, Fx132)

    • [kershaw]

      • Close to having a prototype on test machines capable of running upload tests.

  • Interop 2024 URL (in progress, target H2 2024)

    • [Ed] DefaultURI bypass list - Adding tests for remote settings sync

  • necko-glean: (sekim) Landing glean patches using #ifndef ANDROID blocks tracking such blocks using Bug 1901798  

    • (sekim) Migrating more high priority probes (https://phabricator.services.mozilla.com/D215537, https://phabricator.services.mozilla.com/D216204, https://phabricator.services.mozilla.com/D216620)

  • Fast UDP I/O in Firefox (in progress, target H2 2024)

    • [kershaw]

      • Improve test coverage by turning on HTTP/3 tests on Android. Ready for review.

    • [mxinden]

      • Glean probes

        • http3_udp_datagram_size_send

        • Http3_udp_datagram_size_received

        • https://bugzilla.mozilla.org/show_bug.cgi?id=1906853

        • Need to measure performance impact of measurement itself. See discussion.

      • Milestone 1

        • Blocked on false-positive cargo vet failure.

          • Needs audit for `tracing*` and `tokio`.

          • Latest summary

        • Add Firefox `about:config` pref. Default is UDP IO via NSPR. We can later switch default to quinn-udp and eventually remove pref. Allows for fast roll-back in beta or release channel without full-blown patch release. See comment for details.

        • Simplify C++ -> Rust FFI, always using `i64`, thus preventing all implicit type casts.

        • Fix `RefCell` double-mut-borrow regression in neqo `v0.8.0` refactoring the `RefCell` away, thus making this impossible. Blocker to propagate neqo v0.8.0 changes into mozilla-central. 

        • Manual testing on Linux 64bit, Windows 64bit VM and MacOS (M2 with and without Rosetta)

        • Petr making progress on Solaris support for quinn-udp

      • Milestone 2

        • Improve ECN blackhole handling (thanks Lars!).

  • Performance work: 

    • [acreskey] Bug 1889771 - Increase network.http.max-connections on Android nightly (currently 40 (900 on desktop))

      • Landed telemetry on socket pool exhaustion https://bugzilla.mozilla.org/show_bug.cgi?id=1901855

      • No improvement measured so far on local browsertime tests (high latency, low bandwidth)

      • CI picked up loadtime improvements but vismet regressions, recordings missing

        • https://bugzilla.mozilla.org/show_bug.cgi?id=1904643

      • Patch up that increases to 128 sockets

    • New experiments:

      • OMT Decompression + html5Parser, cssLoader 

        • Experiment Brief

        • Data ticket

        • [Sunil] Experiment is live

          • – enter updates –