<!DOCTYPE html> <html class="reftest-wait"> <title>Test transition from single-alpha layer to component-alpha layer from a display port size change</title> <script type="text/javascript"> document.addEventListener('MozReftestInvalidate', function() { var scrollbox = document.getElementById('scrollbox'); scrollbox.scrollTop = 1000; document.documentElement.className = ''; }); </script> <style> #scrollbox { margin: 20px; width: 300px; height: 400px; overflow-y: scroll; background: linear-gradient(#FFF, #FFF); } #inner { background-color: #000; margin-top: 10px; height: 5px; line-height: 5px; padding-bottom: 400px; } </style> <div id="scrollbox"> <div id="inner"> Text </div> </div>