Meeting 2025-04-22

• Team calendar

  • Next on Necko triage: Valentin

• New contributors / Friends of Necko (3) – Thank you!

  • Andrea Marchesini [:baku]

    •  Bug: 1958422 cookieStore.delete() is unable to delete cookies that were set using cookieStore.set(), when invoked on a page whose URL includes a subdomain

  • Jishnu Murali Thampan

    •  Bug: 1906644 DecodeQ in nsMIMEHeaderParamImpl.cpp doesn't check the return value of PR_sscanf

  • Heather Ellsworth

    •  Bug: 1960463 Intermittent dom/webtransport/test/xpcshell/test_close.js | single tracking bug

• Round Table

  • Automate rust crate updates to mozilla-central

    • https://github.com/mozilla/cargo-vet/issues/293 

      • Nika

    • https://github.com/mozilla/cargo-vet/issues/554 

    • Key drivers: Nika Layzell Daniel Holbert Tom Ritter

    • Survey 

    • Dont need perfect, need dependabot 

    • Migrate to github in next couple weeks = dependabot workflow 

    • Very simple tooling

      • Create bugzilla bug

      • How do we make bugzilla integrate into workflow 

      • Will it understand our vendoring principles 

    • [Greg] Sylvestre Ledru chat 

    • High priority and impediment for Mozilla 

  • [acreskey] Fyi - about:logging now available on Fenix

  • [acreskey] Thoughts requested on this one, blocking Fenix applink startup:

    • Bug 1960712 -  Loading geckoview.xhtml goes through redirect machinery - can we eliminate the redirect?

      • DocumentChannel?

  • [valentin] 10.87 - 3.15% expedia FirstVisualChange / expedia SpeedIndex + 3 more (Linux) regression on Wed April 2 2025

    • Caused by Bug 1957619 - Revalidate cached redirects with no max-age or expires headers r=#necko

    •  I propose WONTFIX - the issue is that the websites have redirects with no max-age or expires headers, which we no longer treat as valid forever.

    • All other browsers behave the same.

  • – enter topics –

• Active Projects roadmap Fx138 rel Apr 29, Fx139 code freeze April 24

  • Firefox Essential Internal Services Toughening[FEISTY] (in progress, TBD)

    • – enter updates –

  • DoH Enablement - Fenix and Focus (in progress, H2-2025)

    • (sekim) Few bugs reported for DoH on Fenix. Reporting them here in case I don’t get to finish/land them all in time. Note that most of the patches/fixes are riding the train in Fx138.

      • Bug 1961306 - "over" in "DNS over HTTPS" should be uncapitalized (IN REVIEW, should be ACCEPTED)

      • Bug 1961583 -  DoH settings page is not scrollable (ACCEPTED)

      • Bug 1961593 - DoH settings page is inconsistent (NOT STARTED)

  • 3rd Party Cookie Deprecation (paused, target TBD)

    • CHIPS rolled out to beta users (100%) via Nimbus

    • 3PCD still will be pending chrome implementation

  • Fast UDP I/O in Firefox (in progress, target Fx137)

    • Rollout on Beta

      • Still ongoing

    • Rollout or Experiment on Release?

  • Http3 upload speed

  • QUIC UDP IO GSO

    • Proof of concept

    • https://github.com/mozilla/neqo/pull/2593

    • No memory copy on each datagram

    • Integrated into neqo-transport

    • Estimated amount of work: 1 engineering week (40h)

  • Implement WebTransport based on HTTP/2 (in progress, Fx139)

    • (sekim) Rebased, waiting for the parent patches to be landed

  • Interop 2025 - URL Pattern (internal review, Fx141)

    • – enter updates –

  • Support Compression Dictionary Transport (in progress, Fx141)

    • Code for storing and restoring dictionaries from the cache written and in debug.

    • Found some edge cases in the implementation (and spec)

      • 304 Not Modified was causing breakages; some holes in the spec around this

    • Still a week or two ahead of schedule

  • Improve Fenix Performance in Slow and Transitional Networks (in progress, TBD)

    • Worked through geckodriver issues, collecting bugs

  • Local Network Access (internal review, TBD)

    • – enter updates –

  • Performance work: 

    • DNS Cache Expiry:

      • Grace period experiment live Start: Apr 02, Enrollment end: Apr 09, End Apr