firefox’s latest version v.3.6, released  on January 21st, 2010 which is Based  on Mozilla’s Gecko 1.9.2 web rendering platform. This Version comes up with the many improvements for web developers, add-on developers, and users.As always the new 3.6 is also faster and more responsive than previous versions.

the Latest firfox includes the following improvements and Features:

Persona: a new type of theme called Personas, which allow users to change Firefox’s appearance with a single click.

1. Protection from out-of-date plugins to keep users safer as they browse.
2. Open, native video can now be displayed full screen and supports poster frames.
3. Improved JavaScript performance, overall browser responsiveness, and startup time.
4. The ability for web developers to indicate that scripts should run asynchronously to speed up page load times.
5. Continued support for downloadable web fonts using the new WOFF font format.
6. Support for new CSS attributes such as gradients, background sizing, and pointer events.
7. Support for new DOM and HTML5 specifications including the Drag & Drop API and the File API, which allow for more interactive web pages.
8. Changes to how third-party software can integrate with Firefox in order to prevent crashes.

Download: http://www.mozilla.com/products/download.html?product=firefox-3.6&os=win&lang=en-US