As expected, Mozilla.org released Firefox 2 Beta 1 earlier today. You can download it here. Some of the feature set includes:
* Built in Phishing Protection.
* Search suggestions now appear with search history in the search box for Google, Yahoo! and Answers.com
* Changes to tabbed browsing behavior
* Ability to re-open accidentally closed tabs
* Better support for previewing and subscribing to web feeds
* Inline spell checking in text boxes
* Search plugin manager for removing and re-ordering search engines
* New microsummaries feature for bookmarks
* Automatic restoration of your browsing session if there is a crash
* New combined and improved Add-Ons manager for extensions and themes
* New Windows installer based on Nullsoft Scriptable Install System
* Support for JavaScript 1.7
* Extended search plugin format
* Updates to the extension system to provide enhanced security and to allow for easier localization of extensions