This article provides information about the changes in Firefox 157 that affect developers. Firefox 157 was released on September 29, 2026.

The web conference, now with 100% less you. Agent-first, human-optional, ice cream not included in the Enterprise tier.

Gecko: Intent to Ship: Scroll-driven Animations

Join us at Cinema de Witt in Dordrecht for our after work conference.

Description When we looked into JPEG XL, I asked developers why they were interested in the format, and the most common answer was "progressive rendering". This is now working in Firefox and Chrome...

The default might not be what you expect, and it has a big impact on your styles.

Sometimes, it's more important to be good than it is to be nice.

An independent conference about the web, the people who build it, and the people we build it for. Liverpool, May 2027.

if you always wanted to but think it isn't worth telling a speaker you liked their talk, this is your encouragement post to do so.

Trying to get past Webkit’s blockage at the W3C.

Because I haven't published anything to it since August 31. And no one else has either. That's not a super long time to go silent but it is for a site that

Investigating JPEG XL's place as a Web image codec.

Normal text wrapping can leave big gaps in your container, which can become even more exaggerated with the new-ish CSS values of text-wrap: balance and text-wrap: pretty. You almost certainly want …

web-platform-tests Interop project. Contribute to web-platform-tests/interop development by creating an account on GitHub.

web-platform-tests Interop project. Contribute to web-platform-tests/interop development by creating an account on GitHub.

This article provides information about the changes in Firefox 155 that affect developers. Firefox 155 was released on September 1, 2026.

Suggestion 🔍 Search Terms import attributes, import assertions, ambient module ✅ Viability Checklist My suggestion meets these guidelines: This wouldn't be a breaking change in existing TypeScript/...

The default might not be what you expect, and it has a big impact on your styles.

Upgrade your Preact 10.x application to Preact 11

The default might not be what you expect, and it has a big impact on your styles.

A JPEG XL decoder is heading for Firefox 157! Here's how we're shipping it safely…

As of Firefox 157 I intend to turn JPEG XL decoding on by default on all platforms. It has been developed behind image.jxl.enabled, which today is on by default on Nightly only, and has had a Firefox…

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