New to the web platform in March

Home Blog New to the web platform in March 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 March 2026. Rachel Andrew GitHub LinkedIn Mastodon Bluesky Homepage Published: March 31, 2026 Stable browser releases Chrome 146 , Firefox 149 and Safari 26.4 released to stable during March. This post takes a look at the new features arriving on the platform this month. Note: Browser compatibility data from MDN is included in these posts. This data might not be updated yet for very recent browser releases. This post displays the correct information as soon as it appears in the browser-compat-data release . Optional container query conditions Both Firefox 149 and Safari 26.4 include support for name-only @container queries that have no conditions. This lets you match against containers based solely on their names, making it more straightforward to style elements based on container context without needing to specify size or style constraints. Scroll-triggered animations Chrome 146 adds scroll-position-based control of animations. This feature lets you create interactions declaratively with CSS, offloading work to a worker thread and improving performance. It also includes JavaScript interfaces for web animations. Learn more in CSS scroll-triggered animations are coming . Browser Support 146 146 x x The trigger-scope property Along with scroll-triggered animations, Chrome 146 introduces the trigger-scope property. This lets you limit the visibility of animation trigger names, helping to isolate animation-to-trigger interactions and avoid global name conflicts. Browser Support 146 146 x x Popover hint value Firefox 149 now supports the hint value for the popover global attribute. Popovers with the hint value won't close auto popovers when displayed, but will close other hint popovers, providing more fine-grained control over popover behavior