FireFox 3.0 Beta 1 has been released to the public. It’s available in 21 different languages for Windows, Mac, and Linux. This version still has hundreds of bugs in it. Asa Dotzler, Mozilla’s Quality Assurance leader, did say that it is the “most thoroughly tested beta [they’ve] ever shipped” though.

• Those of you who do decide to throw caution into the wind and give it a whirl should be prepared for poor extension compatibility. Many extensions, especially those pertaining to bookmarks, will probably not function to their full potential if at all.

New features and changes in this milestone that require feedback include:

• Improved security features such as: better presentation of website identity and security, malware protection, stricter SSL error pages, anti-virus integration in the download manager, and version checking for insecure plugins.
• Improved ease of use through: better password management, easier add-on installation, new download manager with resumable downloading, full page zoom, animated tab strip, and better integration with Windows Vista and Mac OS X.
• Richer personalization through: one-click bookmarking, smart search bookmark folders, direct typing in location bar searches 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, 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 300 memory leak fixes, and a new XPCOM cycle collector to reduce entire classes of leaks.

Check out what’s all new within this beta by looking at the RELEASE NOTES.