mozilla/pdf.js — pull request #4224 by Rob--W (2014-01-30 16:02:40+00:00)
Title: Shortcut responsiveness

Fixes #4222

Whenever the arrow keys, page up/down and home/end are pressed and unhandled, the container is focused (if needed) to make sure that native keyboard navigation works as expected.

If there's any element (other than ``, `` or `<select>`) that should be excluded from this feature, let me know.