Better Known Features:
1. It'll use Cairo Graphics Lib. instead of XULRunner, So the Rendering and UI will be more responsive. (i.e. FF wont hang when you open Digg)
2. It passes ACID2 CSS Test (which Opera/Safari/Konq already passed)
3. It has a new download manager. (Which presumably has a Resume feature)
4. It'll use SQLite Database for storing bookmarks, etc. So it'll be fast.
Thats all I know, However, I would be VERY annoyed if it still hangs(i.e. gets unresponsive for a while) when opening heavy 'web-2.0' sites.
