Bug 1978234 - Use simpler software downscale fallback. r=ahale
Differential Revision:
https://phabricator.services.mozilla.com/D257942
<!DOCTYPE html>
<html class="reftest-wait">
<head>
<link rel="stylesheet" type="text/css" href="style.css">
<script src="animate.js" type="text/javascript"></script>
</head>
<body>
<div id="container"
>surrounding <span id="rel"
style="right: -400px; bottom: -400px;"
>position relative</span> text</div>
<script>
animate({bottom: 10, right: 20}, 100);
</script>
</body>
</html>
