Modern networking in Firefox with Max Inden

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Modern networking in Firefox with Max Inden

netstack.fm

1 hour 7 minutes 38 seconds

1 week ago

Modern networking in Firefox with Max Inden

Episode 11 – Modern networking in Firefox with Max Inden.

A conversation with Max Inden, Staff Software Engineer at Mozilla, about modernizing Firefox’s networking stack in Rust. We cover his work on the QUIC and HTTP/3 stack — improving UDP I/O, congestion control, and overall performance — and why QUIC matters as a fast, encrypted, and evolvable transport for HTTP/3, WebTransport, and beyond.

Learn more:

https://max-inden.de/ — Personal website of Max Inden
https://max-inden.de/post/fast-udp-io-in-firefox/ — Fast UDP I/O for Firefox in Rust — by Max Inden
https://archive.fosdem.org/2025/schedule/event/fosdem-2025-4229-getaddrinfo-sucks-everything-else-is-much-worse/ — getaddrinfo sucks, everything else is much worse — Talk by Valentin Gosu
https://github.com/mozilla/neqo — Mozilla Neqo (HTTP/3 and QUIC stack)
https://datatracker.ietf.org/doc/html/rfc9000 — RFC 9000 – QUIC: A UDP-Based Multiplexed and Secure Transport
https://datatracker.ietf.org/doc/html/rfc9114 — RFC 9114 – HTTP/3
https://datatracker.ietf.org/doc/html/rfc9462 — RFC 9462 – Discovery of Designated Resolvers
https://www.rfc-editor.org/rfc/rfc8484.html — RFC 8484 – DNS Queries over HTTPS (DoH)
https://datatracker.ietf.org/doc/draft-ietf-happy-happyeyeballs-v3/ — Happy Eyeballs Version 3 (Draft)
https://github.com/microsoft/msquic — Microsoft MsQuic
https://developer.mozilla.org/en-US/docs/Web/API/WebTransport — WebTransport API documentation
https://datatracker.ietf.org/wg/masque/about/ — MASQUE (Proxy) protocol introduction
https://www.ietf.org/ — Internet Engineering Task Force (IETF)
https://www.ietf.org/meeting/ — IETF Meetings

Rama

If you like this podcast you might also like our modular network framework in Rust: https://ramaproxy.org

Chapters

00:00 Intro
00:38 Introduction to Max Inden
03:27 Max Inden's Journey to Mozilla
06:32 The Role of IETF in Internet Design
09:42 QUIC and HTTP/3 in Firefox
12:27 Understanding HTTP/3 Upgrade Mechanisms
15:15 Challenges with UDP and Firefox's Networking Stack
18:15 Optimizing UDP I/O for Performance
21:36 Cross-Platform Performance Considerations
24:23 Network Drivers and Their Impact
27:18 Exploring Happy Eyeballs and Connection Strategies
30:07 WebTransport and Future of QUIC
32:56 Contributions to Firefox and Open Source
36:05 Happy Eyeballs and related
56:15 Github Git Hosting
57:24 Quic Usage within Firefox
01:03:02 Closing Thoughts and call to Action
01:06:44 Outro

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Music for this episode was composed by Dj Mailbox. Listen to his music at https://on.soundcloud.com/4MRyPSNj8FZoVGpytj.