The computed left/right margin of the inner box depends on the width of the region2, while we don't even flow any content into region2. I am not sure what's the expected behavior here, but it feels odd that an "unrelated" region's (region2) dimension changes the text position in region1. #outer { border: 1px solid blue; -webkit-flow-into: flow1; } #inner { margin: auto; width: 97%; } #region1, region2 { -webkit-flow-from: flow1; } #region1 { width: 200px; } #region2 { width: 300px; } </style> </head> <body> <div id="outer"> <div id="inner">This text should to painted on the same position.</div> </div> <div id="region1"></div> <div id="region2"></div> </body> </html>
CSS Regions were removed in Bug 174978.