Fire up Terminal and follow 3 steps to have a brand new Firefox
1. Add ubuntu-mozilla ppa
sudo sh -c “echo ‘deb http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu jaunty main’ >> /etc/apt/sources.list”
sudo sh -c “echo ‘deb-src http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu jaunty main’ >> /etc/apt/sources.list”
2. Add the Launchpad PPA GPG key
sudo apt-key adv –keyserver keyserver.ubuntu.com –recv-keys 247510BE
3. Install Firefox 3.5 or Firefox 3.6
sudo apt-get update && sudo apt-get install firefox-3.5
or
sudo apt-get update && sudo apt-get install firefox-3.6

