This tutorial is going to explain how to install firefox 4 in ubuntu using PPA
You can check here what is new in firefox 4 from here
Install firefox 4 using GUI
Go to Applications > Ubuntu Software Center from the top panel go to Edit > Software Sources and click the ‘Other Software’ tab.Press ‘Add’ button and then paste the following line
ppa:mozillateam/firefox-stable
After adding the PPA you will be prompted to update your sources.
Once the update is done you can head to System > Administration > Update Manager to perform an upgrade.
Install firefox 4 using terminal
Go to Applications > Terminal in the terminal just enter the following commands
: "- Sent using Google Toolbar"sudo add-apt-repository ppa:mozillateam/firefox-stable
sudo apt-get update
sudo apt-get upgrade
