Literally trashing Safari seems a bit extreme...
Things I like about Firefox:
- I use Windows, Linux and MacOS X. FF is available for all of them and I prefer using the same app on all systems, if I can.
I do notice it when an app doesn't have the look and feel of the OS, but as long as it's not too different, it doesn't bother me.
- Extensions!
One of the many extensions I use is one that put a close button on each tab, like Safari. I'm not sure if there's a Mac version, as I just recently discovered the extension
- MacOS X: Click-and-hold to popup the context menu. Very useful on my Powerbook.
Things I don't like about Firefox:
- MacOS X: Scrolling is less smooth than Safari.
Most of the sites I visit are tech sites, and all of them are run by people aware of the existence of alternative browsers. Even my banking site display fine in both Safari and FF, so compatibility isn't really that much of an issue.
In terms of stability, they're fairly equal in my experience. Both have crashed their fair share... as longs as they don't drag the OS with them, I don't worry too much, although it's annoying if you have lots of sites open. I wish someone whould take a clue from Opera, since having Opera crash is *so* much less annoying, as it remember everything about your last session. Hm.. actually, IIRC, there's an extension for FF that have a similar function... and doesn't OmniWeb have something like that too?