While the version number may seam like it is a major release, It is actually in fact minor in terms of the new features.
The only major visual change is that the Forward button now hides itself unless it is required. Other updates include support for full-screen web apps, improvements in extension management and Anti-aliasing for WebGL implementation. You can read the full release notes here.
The update will be automatically applied to your browser while you are connected to the internet. However you can also download it using the following links. You can also initiate teh update by finding and opening the 'About Firefox' section on your current browser.
Have any questions or comments on the new version of Firefox? Share your thoughts in the comments section below.