It requires 4 commands to install seamonkey on Ubuntu 12.04.
- echo -e "deb http://downloads.sourceforge.net/project/ubuntuzilla/mozilla/apt all main" | sudo tee -a /etc/apt/sources.list.d/ubuntuzilla.list > /dev/null
- sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com C1289A29
- apt-get update
- sudo apt-get install seamonkey-mozilla-build
