Post

@webdevs.firefox.com

Firefox 154 landed today, and brings with it some great web platform features: 🎉 CSS text-box 🎉 CSS sibling-index() and sibling-count() 🎉 JS Iterator methods like chunks, window, includes, & join 🎉 HTTP No-Vary-Search …And more! developer.mozilla.org/en-US/docs/M...

developer.mozilla.orgFirefox 154 release notes for developers (Stable) - Mozilla | MDNThis article provides information about the changes in Firefox 154 that affect developers. Firefox 154 was released on August 18, 2026.

18/8/26, 1:15 pm14 reposts123 likes

rutchkiwi.eurosky.social

@rutchkiwi.eurosky.social

18 Aug

the search no vary thing isn’t mentioned- what is that?

Firefox for Web Developers

@webdevs.firefox.com

18 Aug

Ohh, good spot. I'll get those docs updated. In the meantime: developer.mozilla.org/en-US/docs/W...

developer.mozilla.orgNo-Vary-Search header - HTTP | MDNThe HTTP No-Vary-Search response header specifies a set of rules that define how a URL's query parameters will affect cache matching. These rules dictate whether the same URL with different URL parame...

Samuel

@samuel.fm

18 Aug

yesss unprefixed line-clamp

Firefox for Web Developers

@webdevs.firefox.com

18 Aug

Not quite yet! That's still behind a pref.

Samuel

@samuel.fm

18 Aug

closer though! I'm still hyped, you can't stop me

Jan Nicklas

@jantimon.bsky.social

18 Aug

2018 I reached out to @fantasai about the missing css text feature that eventually became text-box-trim she was incredibly supportive and did an amazing job on the css spec now only 8 years later it is live in all 3 browsers!! 🎉 thanks to everyone involved!

lists.w3.orgRe: CSS Rhythmic Sizing from fantasai on 2018-10-23 (www-archive@w3.org from October 2018)