Mozilla Bug 472326
bug 474261
Mozilla Bug 423409 Bug 593368
Bug 613502 Bug 610650 Mozilla Bug 614310 Bug 734982 Mozilla Bug 1044431
:
an article
a section
overflow header
overflow article

A paragraph for comparison.

A normal div
A citation

A heading level 1

A heading level 2

A heading level 3

A heading level 4

A heading level 5
A heading level 6
gecko
geckos have sticky toes
clickable span clickable span clickable span