Chromium Browser has already reached version 21 but there is no easy way to install it on Ubuntu.
While deb packages for all three Google Chrome channels are readily available, Chromium PPAs
have not been updated in log time with last version being 18.
Ubuntu’s default browser Firefox receives official updates when there is a new release, but same is not the case with Chromium which will only get updated on a new release of Ubuntu.
Many Ubuntu users were requesting a new build of Chromium and now finally it has been packaged into a PPA by Tobias Wolf. To install it in Ubuntu 12.04, run the commands below:
sudo add-apt-repository ppa:towolf/crack
sudo apt-get update
sudo apt-get install chromium-browser