If you don’t want to wait until Banshee 1.0 is added to Gutsy/Hardy repositories, just add this to your software sources (System > Administration > Software Sources -> Third-Party Software and click Add), for Hardy:

To install it for Ubuntu Intrepid, add the following repository (System > Administration > Software Sources, Third Party Software tab, click "Add"):

This tutorial will explain howto install Firefox 3 RC1 in Ubuntu Hardy.

Go to System > Administration > Software Sources, to the Third-Party Software tab and add this repository:

If you want to install Firefox 3.5 or firefox 3.6 Beta in Ubuntu Jaunty/Intrepid/Hardy use this procedure

To install Firefox 3.1 beta 3pre in Ubuntu, first you need to add a new repository. To do so, go to System > Administration > Software Sources, to the Third-Party Software tab and add this repository:

We are going to get the  new version 3.6 of firefox today if you want to install this  on your ubuntu system use this tutorial (Ubuntu Karmic/Jaunty/Intrepid/Hardy)

Ubuntu users, Firefox 3 beta 5 (3b5) has reached Hardy’s repositories.
To be able to install the extensions that are not supported by this version of firefox, here’s what you must do to bypass it:

When I last checked Virtualbox did not update their repositories for Hardy Heron, its not a problem, their is a hardy package without a repository...So lets install the brand new virtualbox package for Hardy Heron...