1. Open this page in two separate tabs, and start on tab #1.
2. Drag the orange square over the blue square.
3. An alert may appear. Do not dismiss it. If an alert does not appear, PASS, and ignore any further steps.
4. Click the other tab to focus it (or focus it in whatever way works). If you cannot change tabs, PASS, and ignore any further steps.
5. On tab #2, drag the yellow square over the blue square. If you cannot drag the yellow square, PASS, and ignore any further steps.
6. An alert may appear. Do not dismiss it.
7. Return to tab #1.
8. Dismiss the alert without using the left mouse button (eg. use keyboard, or mouse gestures such as gesture-down,gesture-right).
9. Do a short drag and drop within the pink square. If nothing happens, PASS, and ignore any further steps.
10. The word "PASS" should appear in place of this text.