The new version of Mozilla Firefox 20 has been released. On this short tutorial, I am going to show you how to install or upgrade Mozilla Firefox 20 on Ubuntu 12.10 or Ubuntu 13.04. Its pretty simple to upgrade the Firefox to version 20 on Ubuntu.
Steps to upgrade Firefox 20 on Ubuntu 12.10
1. Open Terminal and paste the following command to add mozilla repository to Ubuntu
sudo add-apt-repository ppa:ubuntu-mozilla-security/ppa
2. Upgrade Firefox using command
sudo apt-get update && sudo apt-get dist-upgrade