How to install Thunderbird 8.0 or newest on Ubuntu
Mozilla has releasing new versions of Thunderbird quite often with some new features, faster engine and many bug fixes. You can always read more about new features here.
This tutorial will enable you to install the newest version of Thunderbird automatically when updates are ready. The process is quick and painless. First you must add PPA repository, so any future update will be installed to your system automatically. The next step is installing Thunderbird. Open you terminal and add copy/paste line by line (Ctrl+Shift+V = paste on terminal)
sudo add-apt-repository ppa:mozillateam/thunderbird-stable
sudo apt-get update
sudo apt-get install thunderbird
That’s it. The new thunderbird is installed and ready to use. And when the new version is ready, it will be updated automatically.