Ryan Hunt

I had a fun conversation with the F5 folks about wasm components and the web: www.youtube.com/watch?v=R3bQ...

JPEG XL has arrived on the web, but how does it stack up against AVIF? jakearchibald.com/2026/jpeg-xl...

What do you want us to work on in 2027? Here's a web app where you can rank the Interop proposals you care about, giving us data we can use to prioritise feature development. interop-rank.fxdx.dev

Wasm stack switching in SpiderMonkey is the most complex feature I've ever built. One of those projects you get lost and start rethinking the basics like "what is the stack even really?" Was fun to give a talk on it: www.youtube.com/watch?v=OvYF...

Not sure who needs to hear this but there is not a sensible threat model where you have to defend against the possibility that the operating system lies to you about the size of a block of memory it allocated

WebAssembly Dark Corners: Control Flow... (including: 1 weird trick that Wasm VMs don't want you to know!) eqrion.net/wasm-dark-co...

I'm working on this. We're trying to build a developer preview of wasm components running in Firefox, along with getting good docs and toolchain support so that people can try it out easily. Should have more details later this year!

Gecko: Intent to prototype: WebAssembly Component Model

JS promise integration for WebAssembly landed in Firefox 153, making it easier to work with asynchronous calls from Wasm. Here's how it works:

Well, ten years goes by quick! I'm feeling sentimental, so I thought I'd write about my time at Mozilla, what I've learned, and what I'm still excited for. eqrion.net/ten-years-at...

Midwest tokenmaxxing (iykyk)

Gimme! Gimme! Gimme! An AB(B)A problem in my memory allocator...

Our 4-year old just referred to '?' as the 'mystery mark'. And now I'm wondering if it's not too late to rename it?

We're experimenting with a way to visualize session history in Firefox DevTools, and we'd love your feedback! Here's the background, and how to try it: blog.farre.se/posts/2026/0...

On this Woden's Day, we say Skål to asm.js! spidermonkey.dev/blog/2026/05...

Just had two NPE's this week (aka. Near Pwned2Own Experiences). Always remember: Index liberatus, vita nulla

On June 6 we are hosting the Handmade Network Expo in Vancouver, BC, an event celebrating software made from scratch. Among the lineup: a new game from Anton Mikhailov & @nicbarker.com, a time travel debugger by @leddoo.bsky.social, a language and IDE from @frogtoss.bsky.social, and more. (1/2)

If you're a framework author or maintainer, please consider joining the WFCG! discord.gg/fXCngmSwHz We're trying to find ways the web platform can be improved for frameworks, what new primitives can be added, or what can be changed. We'll be talking about templating today, come join!

Next week we are hosting the Handmade Essentials Jam: a one-week jam where we build essential software from scratch, by hand. If you like building simple software, or want to get better at coding without AI, then sign up and join us next week: handmade.network/jam/essentials

Its the Monthly Swift on WebAssembly Xmas update! forums.swift.org/t/swift-for-...

Nothing summons a foot of snow quicker than whispering to yourself “I think spring is finally here”.

Wow 🤩! @wasm.io just wrapped last week, and the first talk is already live 🚀 Check out: “Towards a Component Model 1.0” by @lukewagner.name 👇 www.youtube.com/watch?v=qq0A... #WebAssembly #Wasm #wasmio26 #ComponentModel

free-solo climbing is cool and all, but have you ever had to carry 2000 lines of uncommitted code on your clipboard while rewriting a different file?

Interested in getting involved in WebAssembly standards? The JS type reflection proposal needs a champion! Mentorship would be available. We'd love to see new folks in wasm standards. Current proposal is here: github.com/WebAssembly/...

If the solution requires a fixed-width font to explain, you know it’s a fun problem.

There are many browsers, but only three widely-used engines. We maintain one of those engines - Gecko. Here's why we feel that browser engine diversity is essential for the future of the web blog.mozilla.org/netpolicy/20...

It's gonna be one of those sorts of days, huh?

wife: we need to talk about our plans for tonight me: wow look at the discontinuity on this snow dune

I fear no man. But that thing... [Implicit Integer Promotion Rules] ...it scares me.

Check out a sample server using wasi-http built with our early #WebAssembly Component Model support in @Kotlin! 🤩 github.com/Kotlin/sampl... Still early, but very satisfying to see it working ✨ Give it a spin and share what you build 🚀 #Wasm #Kotlin #ComponentModel 1/2👇

Finally reached the "Subject Matter Expert" phase of my career. The subject? An exploit targeting code I wrote. But progress is progress?

Your engineers were so preoccupied with potential perf regressions from removing asm.js optimizations, they never stopped to consider the one intranet site that somehow found a way to load-bear on them.

If you’re not getting Kringla for your birthday, then what’s this all been about?

I wrote a thing! Here's my hot take for where WebAssembly should go next: hacks.mozilla.org/2026/02/maki...

Have you ever wanted to learn how a production JS engine works? This video by Luke Wagner on SpiderMonkey is a great start. It's from a 2018 Mozilla event, and was just made public. Most of the details are still accurate AFAIK. mozilla.hosted.panopto.com/Panopto/Page...

WebAssembly is a second-class language on the web, but how can we make it first-class? WebAssembly Components could be the answer… hacks.mozilla.org/2026/02/maki...