Ubuntu updates software versions every six months. Mozilla, on the other hand, upgrades its Firefox every month or two, sometimes every week. These Firefox updates come with critical security patches or new feature-based releases. Ubuntu often includes security patches with its own versions a day or a week after Mozilla releases their patches, but many Ubuntu users think this is not good enough and would prefer to synchronize the latest version of Firefox with Mozilla instead of using the Ubuntu build of Firefox.
To download Firefox from the Mozilla website and use that instead of Ubuntu’s Firefox and install Firefox to the /opt/ directory is easy.
There is a automated way to do so. Ubuntuzilla is a script that automatically detects and downloads the latest version of Firefox, it allows you to select your locale, and it verifies the overall integrity of the download.
You can download it at:
http://ubuntuzilla.wiki.sourceforge.net/
Hope this helps! :)
