Firefox 157 release notes for developers
at-rule() in @supports, a chain value for overscroll-behavior, and Web Animations fixes.
Browser news
What’s new in Chrome 154
Decoration insets, tab semantics for scroll markers, and self-sizing frames.
Browsers situationship: when browsers agree but the spec doesn’t
Sometimes the spec moves toward the browsers, and that isn’t a failure of the process.
WebKit features in Safari 27
83 new features including customizable
<select>, scroll anchoring, WebAssembly JSPI, andariaNotify().
Firefox 156 release notes for developers
Substitution functions in DevTools, priority-preserving yields, and
Promise.try()pass-through.
The browser’s main thread is expensive
Splitting, batching, and offloading work to keep every frame under 10 milliseconds.
What’s new in Chrome 153
Capability elements, single-axis scroll containers, and joint iteration.
You don’t need initial-scale in your HTML
Two authors landed on the same viewport meta element finding hours apart.
Submit your proposals for Interop 2027
What browsers look for: a stable spec, automated tests, and evidence of real pain.
Firefox 155 release notes for developers
attr()for any property, theprogress()andalpha()functions,font-width, andPromise.allKeyed().
What’s new in Chrome 152
Pseudo-element events, device performance tiers, connection allowlists, and relative alpha.
Intent to ship: JPEG XL
Firefox ships the format with the Rust jxl-rs decoder, progressive rendering, and lossless wins.