Are you talking about spoofing as another browser? Of course, Fab's browser can do that, with different settings for different URL's even!
(From above: "- per-url settings (spoofing, images, plugins, ...) like ibrowse")
D'oh! well then, now I know

And yes, spoofing, although I usually connotate "spoofing" as a negative act, whereas me trying to access my bank and being told by their POS website "We only support IE" makes me hot under the collar.