[orca-list] Does Orca not respect role="application" on anything other than body elements?

[Nolan Darilek <nolan thewordnerd info>]

Working on an HTML-based ebook reader and am experimenting with using 
role="application" so someone can't arrow down from a menu into ebook 
text and trash their current position. But it doesn't seem like Orca 
respects role="application" on non-body elements. Take, for instance, 
this attached document. If I put role="application" on the body, 
everything works as expected and I can't arrow around. But with it on 
the <main/> element, nothing changes.

Am I missing something either in the spec, or in some Orca/Firefox 
setup, that still permits this interaction? Thanks.

Title: role="application" test

This is main.