The Latest Version of Firefox is now available in launchpad. For Installing Firefox 3.6 in your machine, do the following steps
First Add the ppa to ubuntu repository, Then Add the GPG Key, update and install
Open a terminal and type the following
$ sudo sh -c "echo 'deb http://ppa.launchpad.net/ubuntu-mozilla-daily/ppa/ubuntu karmic main' /etc/apt/sources.list"
$ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 247510BE
$sudo apt-get update
$sudo apt-get install firefox-3.6
Now You can Start firefox 3.6
Go to Applications --> Internet--> Namoroka Web Browser
