Install - Linux
Ubuntu
Firefox 4 PPA for Ubuntu 10.04 and 10.10 users:
sudo add-apt-repository ppa:mozillateam/firefox-stable
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install firefox ubufox
Firefox 4 PPA for Ubuntu 10.04 and 10.10 users:
sudo add-apt-repository ppa:mozillateam/firefox-stable
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install firefox ubufox