The advice I got in reply to my post below has allowed me to expand the functionality of Firefox so that I can now almost make it my only browser. The only thing I still can’t figure out is why my backend, running Movable Type 3.2, displays just fine in Firefox, while the Hit and Run backend, running the exact same software, doesn’t. Basically, instead of running across the whole screen like it’s supposed to, the interface is just stacked straight down, and the icons and whatnot don’t show up properly. I’m thinking maybe it’s a stylesheet problem, but I just don’t know. Anyone else encounter this kind of problem?
UPDATE: Scratch that, I figured it out. Mozilla-based browsers apparently get confused if stylesheets are served as text ratherh than explicitly having their MIME type identified as CSS. You’d think they’d fix that, but it shouldn’t be too much trouble to tweak it on the Reason server.