New Features on the Web Platform in April
Highlighted features introduced in Chrome, Firefox and Safari updates.
1New Web Standards
April 2026 saw the stable releases of Chrome 147 and Firefox 150, bringing numerous new features and improvements for developers. Safari didn't have a stable release this month. The updates particularly focus on accessibility and user experience enhancements.
2contrast-color() for Accessibility
The contrast-color() CSS function, now available in Chrome 147, has achieved cross-browser support. This function automatically selects black or white text based on which provides maximum contrast against the background color, significantly improving readability and meeting accessibility standards.
3ariaNotify() for Screen Readers
Firefox 150 introduced the ariaNotify() method, providing a more reliable solution for screen reader announcements not tied to DOM updates. Developers can now queue text strings to be announced by assistive technologies, improving accessibility for visually impaired users.
4Advanced Image Management
Firefox now supports the 'auto' keyword for the sizes attribute of img elements, enabling lazy-loaded images to automatically select the optimal source in responsive designs. Chrome 147's element-scoped view transitions allow for targeted animation effects on specific elements.
5Beta Version Features
Chrome 148 beta introduces name-only container queries in CSS and lazy loading for media elements. Firefox 151 beta adds CSS container style queries, while Safari 26.5 beta supports the :open pseudo-class. These features will soon be available in stable releases.
6The Future of the Web
April's updates demonstrate the continuous evolution of the web platform. Focusing on accessibility, performance, and developer experience, these innovations enable better user experiences. Developers should stay informed about these changes to keep their websites modern and competitive.
Original article: web.dev — Nisan Ayında Web Platformuna Eklenen Yeni Özellikler