User-Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.1b2) Gecko/20060817 Firefox/2.0b2
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8.1b2) Gecko/20060817 Firefox/2.0b2
control-n maps to the down arrow key (control-p -> up) for the location/search bar and forms in safari, camino and opera.
firefox has tab (shift-tab) for the url bar but nothing handy for form autocomplete suggestions.
if someone could point out where this is specified in the code i wouldn't mind just fixing this for my own use.
sorry if this should have filed under core and/or location bar and autocomplete.
i figured out how to do this with the keyconfig extension (thanks to firemacs.xpi):
var controller = Components.classes["@mozilla.org/autocomplete/controller;1"].getService(Components.interfaces.nsIAutoCompleteController);
leaving as new, though it no longer concerns me.