When a selectized select control is used in a form, the tab behavior is important. Currently in Firefox, if the option list is long enough to need to scroll, then tabbing out of the selectize input box does not focus the next control. The document.activeElement indicates that the body element is active. Tabbing a second time will either focus the next control or refocus the selectize input box depending on whether there is a selection. This is inconsistent with other browsers and awkward for keyboard navigation.

Demo: http://jsbin.com/xitom/1/
Affects version: 0.9.1
Broken in: Firefox 28, 29
Works in: Chrome, IE
Workaround: Use explicit tabIndex