Hello Linux Geeksters. As you may know, Firefox 29 has been released, coming with the new Australis interface and the Firefox Sync feature. Unlike the old Firefox interface, Australis has a modern and simplistic look with monochrome icons, rounded tabs, bookmarks, download panel, all together providing a Chrome-like eye experience. (If you don’t like the new Australis interface and want to switch the the classic one, see the instructions in this article.)

Also, via the Firefox Sync feature, the users can synchronize their browser data (bookmarks, passwords, history) between multiple devices via email. For more information about the latest Firefox version, see the release notes.
In this article I will show you how to install Firefox 29 on Ubuntu, Linux Mint, Elementary OS, Debian, Fedora, CentOS, OpenSUSE, Mageia and OpenMandriva.
Because Firefox 29 is not available via any repository yet, we have to download Firefox 29 from the Mozilla site, extract the archive, move to /opt and alias the launcher.
Follow the instructions for your system’s architecture exactly, in order to get a successful installation.
How to install Firefox 29 on 32 bit Ubuntu, Linux Mint, Debian, Fedora, CentOS, OpenSUSE, Mageia and OpenMandriva:
$ wget ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/29.0/linux-i686/en-US/firefox-29.0.tar.bz2
$ tar -xjvf firefox-29.0.tar.bz2
$ sudo rm -r /opt/firefox*
$ sudo mv firefox /opt/firefox29
$ sudo ln -sf /opt/firefox29/firefox /usr/bin/firefox
To start Firefox 29, just open a terminal, type firefox and hit enter.
How to install Firefox 29 on 64 bit Ubuntu, Linux Mint, Debian, Fedora, CentOS, OpenSUSE, Mageia and OpenMandriva:
$ wget ftp://ftp.mozilla.org/pub/mozilla.org/firefox/releases/29.0/linux-x86_64/en-US/firefox-29.0.tar.bz2
$ tar -xjvf firefox-29.0.tar.bz2
$ sudo rm -r /opt/firefox*
$ sudo mv firefox /opt/firefox29
$ sudo ln -sf /opt/firefox29/firefox /usr/bin/firefox
To start Firefox 29, just open a terminal, type firefox and hit enter.
Note: This will replace the version of Firefox you have already on your system with Firefox 29.