The most of today webpages are built with fonts that referes to Arial and Verdana. These fonts are included in Microsoft Windows OS and ubuntu has a package called msttcorefonts that needs to be installed before you can use fonts like Arial, Verdana, Georgia, Trebuchet, Webdings etc.
1. Install Windows fonts on your Ubuntu system
Fire up your favorite terminal and enter this command:
$sudo apt-get install msttcorefonts
If you have problems installing msttcorefonts package, check that the Universe repository is enabled. How to enable repositories check this link