Recently, various versions of Firefox and Thunderbird released. Here’s a collection of Ubuntu ppas for installing each version of Firefox and Thunderbird.

Before adding these ppas, check the packages on the link page.

Firefox 5.0 stable, ppa supports Ubuntu 10.04, 10.10, and 11.04

sudo add-apt-repository ppa:mozillateam/firefox-stable
sudo apt-get update
sudo apt-get dist-upgrade

Firefox 6.0 Beta for Ubuntu 10.04, 10.10, and 11.04

sudo add-apt-repository ppa:mozillateam/firefox-next
sudo apt-get update
sudo apt-get dist-upgrade

Firefox 7.0 Aurora for Ubuntu 10.04, 10.10, 11.04, and 10.10

sudo add-apt-repository ppa:ubuntu-mozilla-daily/firefox-aurora
sudo apt-get update
sudo apt-get dist-upgrade

Firefox 8.0 Nightly for Ubuntu 10.04, 10.10, 11.04, and 11.10

sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa
sudo apt-get update
sudo apt-get install firefox-trunk

Thunderbird 5.0 stable for Ubuntu 10.04, 10.10, and 11.04

sudo add-apt-repository ppa:mozillateam/thunderbird-stable
sudo apt-get update
sudo apt-get dist-upgrade

Thunderbird 6.0 Beta for Ubuntu 10.04, 10.10, and 11.04

sudo add-apt-repository ppa:mozillateam/thunderbird-next
sudo apt-get update
sudo apt-get dist-upgrade

Thunderbird 7.0 Aurora for Ubuntu 10.04, 10.10, 11.04, and 11.10

sudo add-apt-repository ppa:ubuntu-mozilla-daily/thunderbird-aurora
sudo apt-get update
sudo apt-get dist-upgrade

Thunderbird 8.0 Nightly for Ubuntu 10.04, 10.10, 11.04, and 11.10

sudo add-apt-repository ppa:ubuntu-mozilla-daily/ppa
sudo apt-get update
sudo apt-get install thunderbird-trunk