Instructions: depress the left mouse button inside the latin text and, while holding down the mouse button, drag it up or down.
Expected result: the computed CSS width should indicate 400px at all times, regardless of presence or absence of vertical scrollbar.
computed CSS height:
computed CSS width: : should be 400px at all times.
Actual results: Firefox 52.9.0 ESR, Firefox 26, Epiphany/3.22.7 (Safari/605.1; WebKit 2.18.6) and Opera 12.16 pass this test. Opera 56.0.3037.0, IE 11.0.2, Chrome 32.0.1700.107 and Konqueror 4.12.1 fail this test.