Browser news — Web Standards

May 19
Firefox 151 release notes for developers
@container style() queries, Document Picture-in-Picture, desktop Web Serial, and keyboardLock.
May 15
Browsers treat big sites differently
How Safari and Firefox quietly patch the web to keep big sites working.
May 12
WebKit features for Safari 26.5
The :open pseudo-class, element-scoped random(), Origin API, and 63 bug fixes.
May 6
What’s new in Chrome 148
Name-only container queries, at-rule() in @supports, lazy <video> and <audio>, Prompt API, and more.
April 21
Firefox 150 release notes for developers
New CSS features, media pseudo-classes, animation range, and ariaNotify().
April 8
What’s new in Chrome 147
View transitions, contrast-color(), border-shape, Math.sumPrecise, and more.
March 25
WebKit features for Safari 26.4
Grid lanes, WebTransport, Keyboard Lock API, and 191 bug fixes.
March 24
Firefox 149 release notes for developers
Popover hint, CloseWatcher, shape-outside: xywh(), and more CSS and API updates.
March 12
What’s new in Chrome 146
Scroll-triggered animations, Sanitizer API, WebGPU compat mode, and more.
February 25
Firefox 148 release notes for developers
HTML sanitizer, Trusted Types, CSS shape(), and more.
February 17
What’s new in Chrome 145
New CSS typography properties, an Origin object, and shorter UA string by default.
February 13
Interop 2026 names 20 browser focus areas
Cross-browser priorities and tests set for 2026’s biggest developer pain points.