• One-click site info: Click the site favicon in the location bar to see who owns the site and to check if your connection is protected from eavesdropping. • Reduced memory usage • Star button: quickly add bookmarks from the location bar • New graphics and font handling • Improvements to our JavaScript engine as well as profile guided optimizations
Get your copy of Firefox 3 RC1 here (English, MB). For other languages, go to Mozilla's download page.
Editor's note: I've been using Firefox 3 beta 5 since it came—it's been golden and noticeably faster than Safari for most tasks.
Give Firefox 3 RC1 a try and report back with your impression.