Shipped September 16: extensions can now drive Chrome's new Tabs Split View API, bringing multitasking layouts under programmatic control. Two tabs, one window, split by the browser's own layout engine: previously the domain of dragging tabs by hand or half-broken window helper libraries.
Why a web audience should care
- Browsers are quietly competing on window management instead of just page rendering, which changes how desktop web apps should think about 'one tab'.
- Extensions that choreograph research workflows, task switches, or documentation side-by-side finally get first-party layout instead of screen coordinates.
- The pattern rhymes with what folding phones already shipped in browsers: the viewport is a spatial thing, and platforms now expose managing it.
For ordinary site code you need nothing: a page in a split pane is just a page in a smaller viewport, and responsive design was always the answer to small viewports. gacor long-game: the window stops being the unit of the web.