It seems like Firefox has this frustrating misfeature where, when drawing a "loading…" bar, it wants the loading bar to always be in at least a *little* bit of motion, which in the case where a download begins and then immediately hangs is (1) misleading and (2) defeats the purpose of the bar, since the bar fills up to 98% and then stalls there, even though some relatively tiny portion of the file (possibly 0%) has loaded