Firefox Temptation

I live on a Macintosh, and on a Macintosh, the native browser is Safari, which is good. But a couple of times in the last week, I’ve cranked up Firefox for one reason or another, and I’m beginning to think it just may be better. Among other things, it seems to be faster. I’m about 80% of the way toward switching. Can anyone provide me with reasons not to? [Update: Some reasons: You can’t drag some pictures from Firefox, and you can’t seem to drag any to Keynote. Apparently sometimes it spins. The text-entry widget is less slick and doesn’t spell-check. Thanks to Stefan Tilkov, Steven Dieringer, Paul Beard, and Carl Robert Blesius.]