<!DOCTYPE HTML> <html> <head> <title>Resize Reflow Test</title> <style> html, body { margin: 0; padding: 0; } html { overflow: hidden } </style> </head> <body> <div style="-moz-column-width: 12em; border: silver solid; height: 5em;"> <div style="border: solid; background: aqua; color: gray;"> blah<br> blah<br> blah<br> blah </div> </div> </body> </html>