<!DOCTYPE HTML> <title>Testcase for float breaking</title> <body style="-moz-column-count: 2; -moz-column-gap: 0; margin: 0; width: 400px; height: 400px"> <!-- two columns, each 200px wide and 400px tall --> <div style="float: left; width: 150px; height: 100px; background: blue"></div> <div style="float: left; width: 75px; height: 200px; background: aqua"></div> <!-- test to see where this float goes --> <div style="float: left; width: 100px; height: 350px; background: fuchsia"></div>