New to the web platform in April

Home Blog New to the web platform in April Stay organized with collections Save and categorize content based on your preferences. Discover some of the interesting features that have landed in stable and beta web browsers during April 2026. Rachel Andrew GitHub LinkedIn Mastodon Bluesky Homepage Published: April 24, 2026 Stable browser releases Chrome 147 and Firefox 150 released to stable during April. There was no stable release of Safari this month. This post takes a look at the many new features this month. Note: Browser compatibility data pulled from MDN is included in these posts and may not have been updated yet for very recent browser releases. The post will show the correct information as soon as it appears in the browser-compat-data release . The contrast-color() CSS function becomes Baseline With Chrome 147 shipping the contrast-color() function, this useful accessibility feature is now available across all major engines, making it Baseline Newly available. This function takes a color value and returns either black or white, depending on which provides the highest contrast against the provided color. This helps ensure your text meets accessibility contrast requirements. Browser Support 147 147 146 26 Source The ariaNotify() method Firefox 150 introduces support for the ariaNotify() method on Document and Element . This method allows content authors to queue a string of text to be announced by a screen reader. This provides a more reliable and ergonomic alternative to ARIA live regions, especially for announcements not tied to DOM updates. Browser Support 141 141 150 x Source Auto sizes for lazy-loaded images Firefox 150 now supports the "auto" keyword for the sizes attribute of <img> elements. This allows lazy-loaded images to use the calculated image layout size to select the best source from a srcset , simplifying responsive image setup. Browser Support 126 126 150 x Element-scoped view transitions Chrome 147 exposes element.startViewTran