Tower models is the only site I've found so far the doesn't work with FireFox. If they stuck to W3C standards their site would work with *any* browser, including text only and those for people with sight/hearing problems. Plus, as almost all the banks have realised, unnecessry Javascript represents a fairly major security risk. Non-IE browsers account for about 15% [1] of web users and rising (there's an awful lot of different browsers out there, not just IE and FireFox) - can anyone ignore 15% of potential customers? Particularly when there is no need to!
Richard
[]1 That figure may well be higher, since many use browser "faking" so that the truly appauling sites don't reject requests based on browser type - yes, some site owners are stupid enough to do that. If I break down browser type in my site stats, I actully get about 20% of non-US vistis using non-IE browsers.