Apple has released Safari 26.4 for macOS and iOS, introducing 44 new features alongside 191 bug fixes and a single deprecation. The update, detailed by Apple Evangelist Jen Simmons, prioritizes developer needs highlighted in 2025 surveys. Key additions include CSS Grid Lanes, a long-awaited solution for complex visual galleries, and WebTransport, a modern alternative to WebSocket enabling low-latency experiences like multiplayer games and live collaboration.

The Keyboard Lock API debuts, allowing web apps to capture keyboard input typically handled by the browser, solving long-standing issues for games and creative tools. The deprecation removes the unnecessary FontFaceSet constructor from the CSS Font Loading API. These improvements aim to provide more consistent feature support across browsers and reduce the burden on developers.