Firefox 3 beta 3 is now available to be downloaded. Updated versions include Windows, Mac OS, and Linux. There aren’t any major new features, but it does have improved OS-specific themes and a new bookmark/history manager. Check out Mozilla Links for a list of changes in the latest beta.

Firstly Firefox 3 beta 3 blends in better in Windows XP, Vista, OS X, and Linux. The new themes are still looking beta, but you will notice redesigned icons and some small changes to the toolbar layout. For example, the backward and forward buttons in the Windows version have been combined into one button. We actually like how it looks… and we found that it to be a faster way of going back and forward.

You will find that the Mac and Linux versions now have native windows for file and text selection boxes and other menus. And the OS X version also includes Growl integration.

Something that we have always wanted is now here. When you try to close multiple tabs or close a browser session with multiple tabs open, Firefox will ask if you want to save your session.