In Ubuntu, the
chromium-browser package is in the Canonical Universe repository, which means that it is community-maintained rather than officially supported by Canonical.
The result of this is that the
chromium-browser package is sometimes out of date, leaving you running an older version of Chromium Browser rather than the latest stable release.
The Launchpad PPA
chromium-team contains Chromium Browser packages that are updated more regularly. The
dev branches are available.
You can add this PPA to your system by first ensuring that the
software-properties-common package is installed, then running the following command (for whicver branch you want):
$ sudo apt-add-respository ppa:chromium-team/stable
chromium-browser packages in the
chromium-team PPA are primarily maintained by Olivier Tilloy of Canonical. The PPA is also referenced in the official Chromium repository in