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Ubuntu gets its stability from heavily testing new versions of software.
Using these newer packages requires using software sources outside from the normal Ubuntu repositories.
Fortunately, there are hundreds, and adding them to Ubuntu is extremely easy!
These other software sources are called Personal Package Archives (PPAs).
All that you really need is the name of the PPA.
In our example, we’re going to use the PPA for daily builds of Mozilla Firefox.
The PPA name isppa:ubuntu-mozilla-daily/ppa.
Note: The method described below is only valid for Ubuntu 9.10 and above.
For earlier versions of Ubuntu, use our earlier guide foradding extra repositories.
Installing those updates gives us the latest version of Firefox!
This PPA also happens to include other packages, including the Firefox 4.0 beta.
With a quick
we can now try out the latest beta version of Firefox.
