To do this, open up the Ubuntu Software Center, head to Edit > Software Sources and click the ‘Other Software’ tab. Press ‘Add’ and then paste ppa:mozillateam/firefox-stable into the relevant field.
After adding the PPA you will be prompted to update your sources. Once done you can head to System > Administration > Update Manager to perform an upgrade
Alternatively you can do the above via the Terminal (Applications > Terminal). Just enter the following two commands separately, entering your password when asked: –
- sudo add-apt-repository ppa:mozillateam/firefox-stable
- sudo apt-get update && sudo apt-get upgrade
You can see our full run down of what’s new and cool in Firefox 4 here.