There is a better answer than installing padma.(i learned this after i wrote my previous post)
This is also a guide to installing Windows ttf fonts in ubuntu. Manorama provides the font in their own site. Download it from here.
Now we need a package called msttcorefonts in ubuntu. Type sudo apt-get install msttcorefonts in your terminal.(or click here to install it).
Now open your home directory. make a folder there and name it ‘.fonts’ (take care to put the .)
[For those who need to know more putting a . hides your folder. Press Ctrl+H to show all hidden folders]
O.K coming back.
Copy the font to the folder.(Copy any ttf font you want there.)
The font will be installed once you reboot. But if you don’t want to do that open your terminal.
Type sudo fc-cache -fv
Close firefox and load the page again.