Chromium is an open source web browser that strives for a secure, fast and stable web browsing experience for its users. It is the open source project behind Google Chrome.
How to install Chromium:
apt-get update apt-get install chromium chromium-l10n
(chromium-l10n is only used for localization and is optional)
Chromium does not provide a way to view PDF method out of the box. The easiest way is to install this extension on the Chrome Web Store, authored by the Google Chrome team.
Otherwise, a method which may work is to download the Chrome deb package from Google Chrome homepage, find the library object file called libpdf.so, and manually move it to where you installed Chromium. An outdated instruction can be found in this post on the Debian user forums.
http://www.chromium.org/ - Chromium homepage.
http://www.google.com/chrome - Google Chrome homepage.
http://superuser.com/questions/523852 - how to install Chrome Web Store extensions on old Chrome versions such as 6.0.