||This test creates multiple panels, one that has been tagged as specific to its tab's content
and one that isn't. When a tab loses focus, panel specific to that tab should close.
The non-specific panel should remain open.
||This test triggers multiple alerts on one single tab, because it"s possible
for web content to do so. The behavior is described in bug 1266353.
We assert the presentation of the multiple alerts, ensuring we show only
the oldest one.
||This test opens a tab that alerts when it is hidden. We then switch away
from the tab, and check that by default the tab is not automatically
re-selected. We also check that a checkbox appears in the alert that allows
the user to enable this automatically re-selecting. We then check that
checking the checkbox does actually enable that behaviour.