
Firefox 153 release notes for developers
Intl.Locale info methods, IndexedDB getAllRecords(), source phase imports, and WebAssembly JSPI.
Web Standards
Daily web platform news

Intl.Locale info methods, IndexedDB getAllRecords(), source phase imports, and WebAssembly JSPI.

Why fallback code helps the web while the standards process catches up.

Subscribe to notifications when web features change status across browsers.

Let AI agents see how your code actually renders in Safari, all running locally.

System accent colors, polygon rounding, animatable zoom, url() modifiers, and text-fit.

field-sizing for form controls, Notification actions, and pointer lock unadjustedMovement.

Six WebKit sessions on Safari 27, grid lanes, customizable <select>, <model> element, and extensions.

58 new features, 525 fixes, customizable <select>, scroll anchoring, and WebAssembly JSPI.

CSS gap decorations, shape-outside functions, SVG path-length, crisp-edges, and back/forward cache for WebSocket.

@container style() queries, Document Picture-in-Picture, desktop Web Serial, and keyboardLock.

How Safari and Firefox quietly patch the web to keep big sites working.

The :open pseudo-class, element-scoped random(), Origin API, and 63 bug fixes.