I’m going to Safari on Mac looking for what Firefox 2.0 doesn’t offer.

Good

Safari is even simpler and cleaner than Firefox. It give much space to the webpage.

Bold font display is good for the eyes.

It is more stable and less frequently crashes on heavy sites.

Easy popup-blocker switch: Command+K

Not so good

Apple advertises that Safari’s performance is 1.5 as much as that of Firefox. Unfortunately, on my PC Safari is about 15% faster.

There aren’t many extensions, which make Firefox famous, for Safari yet.

Security settings of Safari are so basic: no password control, certificate authentication, encryption.