Firefox Version 3 Beta 3 - New Security and Functional Features emerge
The Mozilla foundation has released the 3rd beta for Firefox version 3, which contains some new security and functional features. This new beta version is mainly targeted for IT professionals rather than users. So far in early testing, it is reliable, performs well, and provides significant improvements from the second beta version 
Firefox Version 3 Beta 3 - New Security and Functional Features emerge
http://etech.eweek.com/content/web_technology/firefox_3_beta_3_brings_a_new_browsing_interface.html
http://developer.mozilla.org/devnews/index.php/2008/02/12/firefox-3-beta-3-now-available-for-download/
http://www.mozilla.com/en-US/firefox/3.0b3/releasenotes/
QUOTE: With the release today of Beta 3 of Firefox 3, we are definitely getting closer to the final release of Mozilla's open-source Web browser. But for a third beta, this version of Firefox 3 includes some fairly significant changes from the previous betas, including changes to the main user interface of the browser.
New features and changes in this milestone that require feedback include:
-- Improved security features such as: better presentation of website identity and security including support for Extended Validation (EV) SSL certificates, malware protection, stricter SSL error pages, anti-virus integration in the download manager.
-- Improved ease of use through: easier add-on discovery and installation, improved download manager search and progress indication in the status bar, resumable downloading, full page zoom, and better integration with Windows Vista, Mac OS X and Linux.
-- Richer personalization through: one-click bookmarking, smart bookmark folders, location bar that uses an algorithm based on site visit recency and frequency (called “frecency”) to provide better matches against your history and bookmarks for URLs and page titles, ability to register web applications as protocol handlers, and better customization of download actions for file types.
-- Improved platform features such as: new graphics and font rendering architecture, JavaScript 1.8, major changes to the HTML rendering engine to provide better CSS, float-, and table layout support, native web page form controls, colour profile management, and offline application support.
-- Performance improvements such as: better data reliability for user profiles, architectural improvements to speed up page rendering, over 350 memory leak fixes, a new XPCOM cycle collector to reduce entire classes of leaks, and reductions in the memory footprint.
Firefox download site for all world-wide versions
http://www.mozilla.com/en-US/firefox/all-beta.html