[orca-list] Quick Gecko question

[Nolan Darilek <nolan thewordnerd info>]

A feature I miss from NVDA and Windows is the ability to page through 
Firefox content with pgup/pgdn.

Is this something Firefox under Linux simply doesn't offer? I can't turn 
off Orca and test one way or the other. Not sure if Orca's caret 
navigation captures typical movement keys and provides its own 
processing for them, and may just not have covered the paging keys yet.

Thanks.