The `masonry-auto-flow` CSS property controls how items are placed in a masonry grid layout. By default, the browser's packing algorithm places items in the column with the most available space, which can create confusing, seemingly random layouts and accessibility issues. Setting `masonry-auto-flow: next` forces items to be placed sequentially along the grid axis instead. Currently, this feature is only supported in Firefox and requires enabling a flag in `about:config`.
