Ubuntu 12.04 Install Firefox 20

In this article I will show you how to install the latest (stable) Firefox, Firefox 20, on your Ubuntu 13.04 Raring Ringtail, Ubuntu 12.10 Quantal Quetzal, Ubuntu 12.04 Precise Pangolin, Linux Mint 14 Nadia and Linux Mint 13 Maya.

Installing Firefox 20 on Ubuntu and Mint is quite easy. All you have to do is:
Add the Firefox repo:

$ sudo add-apt-repository ubuntu-mozilla-security/ppa

Update the system:

$ sudo apt-get update

Install Firefox:

 sudo apt-get install firefox

[1] to Install Firefox 20 in Ubuntu 13.04, Ubuntu 12.10, Ubuntu 12.04, Linux Mint 14 and Linux Mint 13 by PPA